Specify release date

It said:
> TypeError: Return value of ParseCsv\tests\properties\BaseClass::setUp() must be an instance of void, none returned

.editorconfig

@@ -13,3 +13,6 @@ insert_final_newline = true
 
 [composer.json]
 indent_size = 4
+
+[.travis.yml]
+indent_size = 2

.gitattributes

@@ -0,0 +1,9 @@
+/.editorconfig export-ignore
+/.gitattributes export-ignore
+/.gitignore export-ignore
+/.travis.yml export-ignore
+/ChangeLog.txt export-ignore
+/examples export-ignore
+/Makefile export-ignore
+/ruleset.xml export-ignore
+/tests export-ignore

.gitignore

@@ -1,6 +1,7 @@
 *.bak
 /.idea
+/composer.lock
+/coverage_clover.xml
 /phive.xml
 /tools
-composer.lock
+/vendor/
-vendor/

.travis.yml

@@ -1,19 +1,24 @@
+dist: trusty
 language: php
+dist: trusty
 
 php:
-  - 7.2
+  - '7.4'
-  - 7.1
+  - '7.3'
-  - 7.0
+  - '7.2'
-  - 5.6
+  - '7.1'
-  - 5.5
+
-  - 5.4
+before_install:
+  - composer update
 
 script:
-  - phpunit --version
+  - composer validate
-  - phpunit --configuration tests/phpunit.xml
+  - vendor/bin/phpunit --version
+  - vendor/bin/phpunit --configuration tests/phpunit.xml
 
 notifications:
   email:
+    recipients:
       - will.knauss@gmail.com
     on_success: never
     on_failure: always

ChangeLog.txt

@@ -1,3 +1,133 @@
+ParseCSV 1.3.0
+-----------------------------------
+Date: 14-Apr-2021
+
+Breaking changes:
+- Passing file paths to parse() or new Csv() is now deprecated
+  and will be removed in v2.0.0. Use ->parseFile() instead.
+
+  WARNING: It will call trigger_error() for now.
+  This may still break your application, depending on your
+  php.ini config. You can add E_USER_DEPRECATED to the
+  error_reporting mask to avoid breaking your application:
+
+  Example:
+
+  error_reporting = E_ALL & ~E_DEPRECATED & ~E_STRICT & ~E_USER_DEPRECATED
+
+  This change is to avoid security issues: see issue #198.
+
+Non-breaking deprecations:
+- The function load_data() is deprecated.
+  Call loadFile() or loadDataString() instead.
+- Supplying CSV data (file content) to auto() is deprecated.
+  Please use autoDetectionForDataString().
+
+  The motivation is to make subtle gotchas less likely: when the
+  file cannot be found or read by PHP (permissions), its file path
+  would be treated like CSV data.
+- Currently, there is code to parse .php: <?...?> tags are removed
+  before the remaining file content is treated like a .csv file.
+  This rarely-used functionality will be removed in v2.0.0.
+  You are only affected if you use ParseCsv to parse .php files.
+
+New features: none
+Bug fixes: none
+-----------------------------------
+
+
+ParseCSV 1.2.1
+-----------------------------------
+Date: 25-Apr-2020
+
+Breaking changes: none
+New features: none
+Bug fixes: none
+
+Code quality:
+- Switched from PHPUnit 4 to 6 to get rid of
+  wrappers. This will reduce friction for PhpStorm users,
+  because it gets rid of the "Multiple definitions" error
+  See issue #188. Thanks to @SharkMachine for the hint.
+-----------------------------------
+
+
+ParseCSV 1.2.0
+-----------------------------------
+Date: 07-Jan-2020
+
+Breaking changes: none
+
+New features:
+- Compatible with PHP 7.4. Thanks to @andreybolonin
+  @morrislaptop @martijnengler and @fjf2002.
+- unparse() now also understands $use_mb_convert_encoding.
+- Verbal condition operators are now allowed to contain
+  upper case letters, for example:
+  $csv->conditions = 'rating IS GREATER THAN 4';
+
+Bug fixes:
+-  All filter condition operators containing "is" or "equals"
+   were broken.
+
+Code quality:
+- Improved test coverage.
+-----------------------------------
+
+
+ParseCSV 1.1.1
+-----------------------------------
+Date: 2-Feb-2019
+
+Breaking changes: none
+
+New features: none
+
+Bug fixes:
+- Function load_data: check length of input, prevents E_NOTICE
+  if too long.
+- Fixed bugs in unparse().
+
+Code quality:
+- Improved test coverage.
+-----------------------------------
+
+
+ParseCSV 1.1.0
+-----------------------------------
+Date: 9-Aug-2018
+
+Breaking changes:
+- Ignore entirely empty lines at the end of files
+  See https://github.com/parsecsv/parsecsv-for-php/pull/142
+- Dropped support for PHP 5.4. Now, you need at leas PHP 5.5.
+- Fixed parse()'s return value: return true only if $data is useful.
+
+New features:
+- Added support for Laravel-style collections via the
+  new getCollection() function - see
+  https://github.com/parsecsv/parsecsv-for-php/pull/134
+- New function getTotalDataRowCount() - useful if
+  $limit is set - see pull request #122.
+- Added requires to keep Composer-free environments working.
+
+Bug fixes:
+- Better support for streams.
+  See https://github.com/parsecsv/parsecsv-for-php/pull/147
+- Fixed output() with custom header.
+  See https://github.com/parsecsv/parsecsv-for-php/issues/132
+- Fixed bug on _validate_fields_for_unparse() if titles property
+  is used instead of fields parameter for changing the titles for
+  unparsing.
+- Fixed bug in unparse() that caused incorrect column order
+  (Issue #41).
+
+
+Code quality:
+- Improved test coverage.
+-----------------------------------
+
+
 ParseCSV 1.0.0
 -----------------------------------
 Date: 3-March-2018
@@ -12,7 +142,7 @@ Date: 3-March-2018
   guesses the type of each column.
 
 - MIME: output() sends correct MIME type to browser
-  if the separator is a tab tab (Issue #79).
+  if the separator is a tab char (Issue #79).
 
 - Added support for mb_convert_encoding() instead of
   iconv() - see issue #109.

README.md

@@ -1,11 +1,12 @@
 # ParseCsv
+[![Financial Contributors on Open Collective](https://opencollective.com/parsecsv/all/badge.svg?label=financial+contributors)](https://opencollective.com/parsecsv)
 
 ParseCsv is an easy-to-use PHP class that reads and writes CSV data properly. It
 fully conforms to the specifications outlined on the on the
 [Wikipedia article][CSV] (and thus RFC 4180). It has many advanced features which help make your
 life easier when dealing with CSV data.
 
-You may not need a library at all: before using ParseCsv, please make sure if PHP's own `str_getcsv()`, ``fgetcvs()`` or `fputcsv()` meets your needs.
+You may not need a library at all: before using ParseCsv, please make sure if PHP's own `str_getcsv()`, ``fgetcsv()`` or `fputcsv()` meets your needs.
 
 This library was originally created in early 2007 by [jimeh](https://github.com/jimeh) due to the lack of built-in
 and third-party support for handling CSV data in PHP.
@@ -26,7 +27,7 @@ and third-party support for handling CSV data in PHP.
   how different programs like Excel for example outputs CSV data.
 * Support for character encoding conversion using PHP's
   `iconv()` and `mb_convert_encoding()` functions.
-* Supports PHP 5.4 and higher.
+* Supports PHP 5.5 and higher.
   It certainly works with PHP 7.2 and all versions in between.
 
 ## Installation
@@ -52,48 +53,91 @@ To use ParseCSV, you then have to add a `require 'parsecsv.lib.php';` line.
 
 ## Example Usage
 
-**General**
+**General parsing**
 
 ```php
-$csv = new ParseCsv\Csv('data.csv');
+$csv = new \ParseCsv\Csv('data.csv');
 print_r($csv->data);
 ```
 
 **Tab delimited, and encoding conversion**
 
 ```php
-$csv = new ParseCsv\Csv();
+$csv = new \ParseCsv\Csv();
 $csv->encoding('UTF-16', 'UTF-8');
 $csv->delimiter = "\t";
-$csv->parse('data.tsv');
+$csv->parseFile('data.tsv');
 print_r($csv->data);
 ```
 
 **Auto-detect delimiter character**
 
 ```php
-$csv = new ParseCsv\Csv();
+$csv = new \ParseCsv\Csv();
 $csv->auto('data.csv');
 print_r($csv->data);
 ```
 
-**Modify data in a CSV file**
+**Parse data with offset**
+* ignoring the first X (e.g. two) rows
+```php
+$csv = new \ParseCsv\Csv();
+$csv->offset = 2;
+$csv->parseFile('data.csv');
+print_r($csv->data);
+```
+
+**Limit the number of returned data rows**
+```php
+$csv = new \ParseCsv\Csv();
+$csv->limit = 5;
+$csv->parseFile('data.csv');
+print_r($csv->data);
+```
+
+**Get total number of data rows without parsing whole data**
+* Excluding heading line if present (see $csv->header property)
+```php
+$csv = new \ParseCsv\Csv();
+$csv->loadFile('data.csv');
+$count = $csv->getTotalDataRowCount();
+print_r($count);
+```
+
+**Get most common data type for each column**
 
 ```php
-$csv = new ParseCsv\Csv();
+$csv = new \ParseCsv\Csv('data.csv');
+$csv->getDatatypes();
+print_r($csv->data_types);
+```
+
+**Modify data in a CSV file**
+
+Change data values:
+```php
+$csv = new \ParseCsv\Csv();
 $csv->sort_by = 'id';
-$csv->parse('data.csv');
+$csv->parseFile('data.csv');
 # "4" is the value of the "id" column of the CSV row
 $csv->data[4] = array('firstname' => 'John', 'lastname' => 'Doe', 'email' => 'john@doe.com');
 $csv->save();
 ```
 
+Enclose each data value by quotes:
+```php
+$csv = new \ParseCsv\Csv();
+$csv->parseFile('data.csv');
+$csv->enclose_all = true;
+$csv->save();
+```
+
 **Replace field names or set ones if missing**
 
 ```php
-$csv = new ParseCsv\Csv();
+$csv = new \ParseCsv\Csv();
-$csv->fields = ['id', 'name', 'category']
+$csv->fields = ['id', 'name', 'category'];
-$csv->parse('data.csv');
+$csv->parseFile('data.csv');
 ```
 
 **Add row/entry to end of CSV file**
@@ -101,20 +145,34 @@ $csv->parse('data.csv');
 _Only recommended when you know the exact structure of the file._
 
 ```php
-$csv = new ParseCsv\Csv();
+$csv = new \ParseCsv\Csv();
-$csv->save('data.csv', array(array('1986', 'Home', 'Nowhere', '')), true);
+$csv->save('data.csv', array(array('1986', 'Home', 'Nowhere', '')), /* append */ true);
 ```
 
 **Convert 2D array to CSV data and send headers to browser to treat output as
 a file and download it**
 
 ```php
-$csv = new ParseCsv\Csv();
+$csv = new \ParseCsv\Csv();
-$csv->output('movies.csv', $array, array('field 1', 'field 2'), ',');
+$csv->linefeed = "\n";
+$header = array('field 1', 'field 2');
+$csv->output('movies.csv', $data_array, $header, ',');
 ```
 
 For more complex examples, see the ``tests`` and `examples` directories.
 
+## Test coverage
+
+All tests are located in the `tests` directory. To execute tests, run the following commands:
+
+````bash
+composer install
+composer run test
+````
+
+When pushing code to GitHub, tests will be executed using Travis CI. The relevant configuration is in the
+file `.travis.yml`.
+
 ## Credits
 
 * ParseCsv is based on the concept of [Ming Hong Ng][ming]'s [CsvFileParser][]
@@ -126,11 +184,37 @@ For more complex examples, see the ``tests`` and `examples` directories.
 
 ## Contributors
 
+### Code Contributors
+
+This project exists thanks to all the people who contribute.
+
 Please find a complete list on the project's [contributors][] page.
 
 [contributors]: https://github.com/parsecsv/parsecsv-for-php/graphs/contributors
+<a href="https://github.com/parsecsv/parsecsv-for-php/graphs/contributors"><img src="https://opencollective.com/parsecsv/contributors.svg?width=890&button=false" /></a>
 
+### Financial Contributors
 
+Become a financial contributor and help us sustain our community. [[Contribute](https://opencollective.com/parsecsv/contribute)]
+
+#### Individuals
+
+<a href="https://opencollective.com/parsecsv"><img src="https://opencollective.com/parsecsv/individuals.svg?width=890"></a>
+
+#### Organizations
+
+Support this project with your organization. Your logo will show up here with a link to your website. [[Contribute](https://opencollective.com/parsecsv/contribute)]
+
+<a href="https://opencollective.com/parsecsv/organization/0/website"><img src="https://opencollective.com/parsecsv/organization/0/avatar.svg"></a>
+<a href="https://opencollective.com/parsecsv/organization/1/website"><img src="https://opencollective.com/parsecsv/organization/1/avatar.svg"></a>
+<a href="https://opencollective.com/parsecsv/organization/2/website"><img src="https://opencollective.com/parsecsv/organization/2/avatar.svg"></a>
+<a href="https://opencollective.com/parsecsv/organization/3/website"><img src="https://opencollective.com/parsecsv/organization/3/avatar.svg"></a>
+<a href="https://opencollective.com/parsecsv/organization/4/website"><img src="https://opencollective.com/parsecsv/organization/4/avatar.svg"></a>
+<a href="https://opencollective.com/parsecsv/organization/5/website"><img src="https://opencollective.com/parsecsv/organization/5/avatar.svg"></a>
+<a href="https://opencollective.com/parsecsv/organization/6/website"><img src="https://opencollective.com/parsecsv/organization/6/avatar.svg"></a>
+<a href="https://opencollective.com/parsecsv/organization/7/website"><img src="https://opencollective.com/parsecsv/organization/7/avatar.svg"></a>
+<a href="https://opencollective.com/parsecsv/organization/8/website"><img src="https://opencollective.com/parsecsv/organization/8/avatar.svg"></a>
+<a href="https://opencollective.com/parsecsv/organization/9/website"><img src="https://opencollective.com/parsecsv/organization/9/avatar.svg"></a>
 
 ## License
 

composer.json

@@ -10,13 +10,19 @@
         {
             "name": "William Knauss",
             "email": "will.knauss@gmail.com"
+        },
+        {
+            "name": "Susann Sgorzaly",
+            "homepage": "https://github.com/susgo"
+        },
+        {
+            "name": "Christian Bläul",
+            "homepage": "https://github.com/Fonata"
         }
     ],
     "autoload": {
         "psr-4": {
-            "ParseCsv\\": "src",
+            "ParseCsv\\": "src"
-            "ParseCsv\\extensions\\": "src\\extensions",
-            "ParseCsv\\tests\\": "tests"
         }
     },
     "autoload-dev": {
@@ -24,7 +30,28 @@
             "ParseCsv\\tests\\": "tests"
         }
     },
+    "require": {
+        "php": ">=5.5"
+    },
     "require-dev": {
-        "phpunit/phpunit": "4.1.*"
+        "phpunit/phpunit": "^6",
+        "squizlabs/php_codesniffer": "^3.5"
+    },
+    "suggest": {
+        "illuminate/support": "Fluent array interface for map functions"
+    },
+    "extra": {
+        "branch-alias": {
+            "dev-master": "1.0.x-dev"
+        }
+    },
+    "scripts": {
+        "test": [
+            "vendor/bin/phpunit -c tests tests --disallow-test-output --coverage-clover coverage_clover.xml --whitelist src"
+        ]
+    },
+    "support": {
+        "issues": "https://github.com/parsecsv/parsecsv-for-php/issues",
+        "source": "https://github.com/parsecsv/parsecsv-for-php"
     }
 }

examples/basic.php

@@ -3,6 +3,7 @@
 
 # include parseCSV class.
 require __DIR__ . '/../vendor/autoload.php';
+
 use ParseCsv\Csv;
 
 
@@ -17,8 +18,8 @@ $csv->auto('_books.csv');
 # if its not the default comma...
 // $csv->delimiter = "\t";   # tab delimited
 
-# ...and then use the parse() function.
+# ...and then use the parseFile() function.
-// $csv->parse('_books.csv');
+// $csv->parseFile('_books.csv');
 
 
 # Output result.
@@ -40,7 +41,7 @@ $csv->auto('_books.csv');
         background-color: #FFF;
     }
 </style>
-<table border="0" cellspacing="1" cellpadding="3">
+<table>
     <tr>
         <?php foreach ($csv->titles as $value): ?>
             <th><?php echo $value; ?></th>

examples/conditions.php

@@ -4,6 +4,7 @@
 
 # include parseCSV class.
 require __DIR__ . '/../vendor/autoload.php';
+
 use ParseCsv\Csv;
 
 
@@ -16,6 +17,7 @@ $csv = new Csv();
 $csv->conditions = 'author does not contain dan brown';
 // $csv->conditions = 'rating < 4 OR author is John Twelve Hawks';
 // $csv->conditions = 'rating > 4 AND author is Dan Brown';
+// $csv->conditions = 'rating is greater than 4';
 
 
 # Parse '_books.csv' using automatic delimiter detection.
@@ -41,7 +43,7 @@ $csv->auto('_books.csv');
         background-color: #FFF;
     }
 </style>
-<table border="0" cellspacing="1" cellpadding="3">
+<table>
     <tr>
         <?php foreach ($csv->titles as $value): ?>
             <th><?php echo $value; ?></th>

examples/download.php

@@ -3,6 +3,7 @@
 
 # include parseCSV class.
 require __DIR__ . '/../vendor/autoload.php';
+
 use ParseCsv\Csv;
 
 
@@ -31,5 +32,3 @@ $csv->output('books.csv');
 # data to download the output as a CSV file. if it's not set
 # or is set to null, output will only return the generated CSV
 # output data, and will not output to the browser itself.
-
-?>

examples/limit.php

@@ -4,6 +4,7 @@
 
 # include parseCSV class.
 require __DIR__ . '/../vendor/autoload.php';
+
 use ParseCsv\Csv;
 
 
@@ -54,7 +55,7 @@ $csv->auto('_books.csv');
         background-color: #FFF;
     }
 </style>
-<table border="0" cellspacing="1" cellpadding="3">
+<table>
     <tr>
         <?php foreach ($csv->titles as $value): ?>
             <th><?php echo $value; ?></th>

examples/save_to_file_without_header_row.php

@@ -0,0 +1,27 @@
+<?php
+
+
+# include parseCSV class.
+require __DIR__ . '/../vendor/autoload.php';
+
+use ParseCsv\Csv;
+
+
+# Create new parseCSV object.
+$csv = new Csv();
+
+# When saving, don't write the header row:
+$csv->heading = false;
+
+# Specify which columns to write, and in which order.
+# We won't output the 'Awesome' column this time.
+$csv->titles = ['Age', 'Name'];
+
+# Data to write:
+$csv->data = [
+    0 => ['Name' => 'Anne', 'Age' => 45, 'Awesome' => true],
+    1 => ['Name' => 'John', 'Age' => 44, 'Awesome' => false],
+];
+
+# Then we save the file to the file system:
+$csv->save('people.csv');

parsecsv.lib.php

@@ -6,6 +6,10 @@
 
 // Check if people used Composer to include this project in theirs
 if (!file_exists(__DIR__ . '/vendor/autoload.php')) {
+    require __DIR__ . '/src/enums/AbstractEnum.php';
+    require __DIR__ . '/src/enums/DatatypeEnum.php';
+    require __DIR__ . '/src/enums/FileProcessingModeEnum.php';
+    require __DIR__ . '/src/enums/SortEnum.php';
     require __DIR__ . '/src/extensions/DatatypeTrait.php';
     require __DIR__ . '/src/Csv.php';
 } else {

ruleset.xml

@@ -0,0 +1,3 @@
+<?xml version="1.0"?>
+<ruleset xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" name="ParseCSV" xsi:noNamespaceSchemaLocation="https://raw.githubusercontent.com/squizlabs/PHP_CodeSniffer/master/phpcs.xsd">
+</ruleset>

src/Csv.php

@@ -2,12 +2,14 @@
 
 namespace ParseCsv;
 
+use Illuminate\Support\Collection;
+use ParseCsv\enums\FileProcessingModeEnum;
+use ParseCsv\enums\SortEnum;
 use ParseCsv\extensions\DatatypeTrait;
 
 class Csv {
 
     /*
-    Class: ParseCSV 1.0.0
     https://github.com/parsecsv/parsecsv-for-php
 
     Fully conforms to the specifications lined out on Wikipedia:
@@ -16,7 +18,6 @@ class Csv {
     Based on the concept of Ming Hong Ng's CsvFileParser class:
     - http://minghong.blogspot.com/2006/07/csv-parser-for-php.html
 
-
     (The MIT license)
 
     Copyright (c) 2014 Jim Myhrberg.
@@ -89,7 +90,7 @@ class Csv {
      *
      * @var string|null
      */
-    public $sort_type = null;
+    public $sort_type = SortEnum::SORT_TYPE_REGULAR;
 
     /**
      * Delimiter
@@ -125,7 +126,9 @@ class Csv {
 
     /**
      * Offset
-     * Number of rows to ignore from beginning of data
+     * Number of rows to ignore from beginning of data. If present, the heading
+     * row is also counted (if $this->heading == true). In other words,
+     * $offset == 1 and $offset == 0 have the same meaning in that situation.
      *
      * @var int|null
      */
@@ -148,7 +151,7 @@ class Csv {
     public $auto_depth = 15;
 
     /**
-     * Auto Non Charts
+     * Auto Non Chars
      * Characters that should be ignored when attempting to auto-detect delimiter
      *
      * @var string
@@ -166,7 +169,7 @@ class Csv {
 
     /**
      * Convert Encoding
-     * Should we convert the csv encoding?
+     * Should we convert the CSV character encoding?
      *
      * @var bool
      */
@@ -275,8 +278,20 @@ class Csv {
     public $error_info = array();
 
     /**
-     * Titles
+     * $titles has 4 distinct tasks:
-     * CSV titles if they exists
+     * 1. After reading in CSV data, $titles will contain the column headers
+     *    present in the data.
+     *
+     * 2. It defines which fields from the $data array to write e.g. when
+     *    calling unparse(), and in which order. This lets you skip columns you
+     *    don't want in your output, but are present in $data.
+     *    See examples/save_to_file_without_header_row.php.
+     *
+     * 3. It lets you rename columns. See StreamTest::testWriteStream for an
+     *    example.
+     *
+     * 4. When writing data and $header is true, then $titles is also used for
+     *    the first row.
      *
      * @var array
      */
@@ -284,7 +299,7 @@ class Csv {
 
     /**
      * Data
-     * Two dimensional array of CSV data
+     * Two-dimensional array of CSV data
      *
      * @var array
      */
@@ -296,13 +311,41 @@ class Csv {
      * Constructor
      * Class constructor
      *
-     * @param  string|null  $input          The CSV string or a direct filepath
+     * @param string|null $data            The CSV string or a direct file path.
-     * @param  integer|null $offset         Number of rows to ignore from the beginning of  the data
+     *
-     * @param  integer|null $limit          Limits the number of returned rows to specified amount
+     *                                     WARNING: Supplying file paths here is
-     * @param  string|null  $conditions     Basic SQL-like conditions for row matching
+     *                                     deprecated. Use parseFile() instead.
-     * @param  null|true    $keep_file_data Keep raw file data in memory after successful parsing (useful for debugging)
+     *
+     * @param int|null    $offset          Number of rows to ignore from the
+     *                                     beginning of  the data
+     * @param int|null    $limit           Limits the number of returned rows
+     *                                     to specified amount
+     * @param string|null $conditions      Basic SQL-like conditions for row
+     *                                     matching
+     * @param null|true   $keep_file_data  Keep raw file data in memory after
+     *                                     successful parsing
+     *                                     (useful for debugging)
      */
-    public function __construct($input = null, $offset = null, $limit = null, $conditions = null, $keep_file_data = null) {
+    public function __construct($data = null, $offset = null, $limit = null, $conditions = null, $keep_file_data = null) {
+        $this->init($offset, $limit, $conditions, $keep_file_data);
+
+        if (!empty($data)) {
+            $this->parse($data);
+        }
+    }
+
+    /**
+     * @param int|null    $offset           Number of rows to ignore from the
+     *                                      beginning of  the data
+     * @param int|null    $limit            Limits the number of returned rows
+     *                                      to specified amount
+     * @param string|null $conditions       Basic SQL-like conditions for row
+     *                                      matching
+     * @param null|true   $keep_file_data   Keep raw file data in memory after
+     *                                      successful parsing
+     *                                      (useful for debugging)
+     */
+    public function init($offset = null, $limit = null, $conditions = null, $keep_file_data = null) {
         if (!is_null($offset)) {
             $this->offset = $offset;
         }
@@ -318,10 +361,6 @@ class Csv {
         if (!is_null($keep_file_data)) {
             $this->keep_file_data = $keep_file_data;
         }
-
-        if (!empty($input)) {
-            $this->parse($input);
-        }
     }
 
     // ==============================================
@@ -332,44 +371,47 @@ class Csv {
      * Parse
      * Parse a CSV file or string
      *
-     * @param  string|null $input      The CSV string or a direct filepath
+     * @param string|null $dataString  The CSV string or a direct file path
-     * @param  integer     $offset     Number of rows to ignore from the beginning of  the data
+     *                                 WARNING: Supplying file paths here is
-     * @param  integer     $limit      Limits the number of returned rows to specified amount
+     *                                 deprecated and will trigger an
-     * @param  string      $conditions Basic SQL-like conditions for row matching
+     *                                 E_USER_DEPRECATED error.
+     * @param int|null    $offset      Number of rows to ignore from the
+     *                                 beginning of  the data
+     * @param int|null    $limit       Limits the number of returned rows to
+     *                                 specified amount
+     * @param string|null $conditions  Basic SQL-like conditions for row
+     *                                 matching
      *
      * @return bool True on success
      */
-    public function parse($input = null, $offset = null, $limit = null, $conditions = null) {
+    public function parse($dataString = null, $offset = null, $limit = null, $conditions = null) {
-        if (is_null($input)) {
+        if (is_null($dataString)) {
-            $input = $this->file;
+            $this->data = $this->parseFile();
+            return $this->data !== false;
         }
 
-        if (!empty($input)) {
+        if (empty($dataString)) {
-            if (!is_null($offset)) {
-                $this->offset = $offset;
-            }
-
-            if (!is_null($limit)) {
-                $this->limit = $limit;
-            }
-
-            if (!is_null($conditions)) {
-                $this->conditions = $conditions;
-            }
-
-            if (strlen($input) <= PHP_MAXPATHLEN && is_readable($input)) {
-                $this->data = $this->parse_file($input);
-            } else {
-                $this->file_data = &$input;
-                $this->data = $this->parse_string();
-            }
-
-            if ($this->data === false) {
             return false;
         }
+
+        $this->init($offset, $limit, $conditions);
+
+        if (strlen($dataString) <= PHP_MAXPATHLEN && is_readable($dataString)) {
+            $this->file = $dataString;
+            $this->data = $this->parseFile();
+            trigger_error(
+                'Supplying file paths to parse() will no longer ' .
+                'be supported in a future version of ParseCsv. ' .
+                'Use ->parseFile() instead.',
+                E_USER_DEPRECATED
+            );
+        } else {
+            $this->file = null;
+            $this->file_data = &$dataString;
+            $this->data = $this->_parse_string();
         }
 
-        return true;
+        return $this->data !== false;
     }
 
     /**
@@ -378,17 +420,20 @@ class Csv {
      *
      * @param string $file    File location to save to
      * @param array  $data    2D array of data
-     * @param  bool   $append Append current data to end of target CSV, if file exists
+     * @param bool   $append  Append current data to end of target CSV, if file
-     * @param  array  $fields Field names
+     *                        exists
+     * @param array  $fields  Field names. Sets the header. If it is not set
+     *                        $this->titles would be used instead.
      *
      * @return bool
+     *   True on success
      */
-    public function save($file = '', $data = array(), $append = false, $fields = array()) {
+    public function save($file = '', $data = array(), $append = FileProcessingModeEnum::MODE_FILE_OVERWRITE, $fields = array()) {
         if (empty($file)) {
             $file = &$this->file;
         }
 
-        $mode = $append ? 'ab' : 'wb';
+        $mode = FileProcessingModeEnum::getAppendMode($append);
         $is_php = preg_match('/\.php$/i', $file) ? true : false;
 
         return $this->_wfile($file, $this->unparse($data, $fields, $append, $is_php), $mode);
@@ -401,7 +446,10 @@ class Csv {
      * @param string|null $filename    If a filename is specified here or in the
      *                                 object, headers and data will be output
      *                                 directly to browser as a downloadable
-     *                                 file.
+     *                                 file. This file doesn't have to exist on
+     *                                 the server; the parameter only affects
+     *                                 how the download is called to the
+     *                                 browser.
      * @param array[]     $data        2D array with data
      * @param array       $fields      Field names
      * @param string|null $delimiter   character used to separate data
@@ -440,8 +488,10 @@ class Csv {
      * Encoding
      * Convert character encoding
      *
-     * @param  string $input  Input character encoding, uses default if left blank
+     * @param string|null $input  Input character encoding, uses default if left blank
-     * @param  string $output Output character encoding, uses default if left blank
+     * @param string|null $output Output character encoding, uses default if left blank
+     *
+     * @return void
      */
     public function encoding($input = null, $output = null) {
         $this->convert_encoding = true;
@@ -460,12 +510,15 @@ class Csv {
      * rows to determine most probable delimiter character
      *
      * @param string|null $file          Local CSV file
+     *                                   Supplying CSV data (file content) here is deprecated.
+     *                                   For CSV data, please use autoDetectionForDataString().
+     *                                   Support for CSV data will be removed in v2.0.0.
      * @param bool        $parse         True/false parse file directly
-     * @param  int         $search_depth Number of rows to analyze
+     * @param int|null    $search_depth  Number of rows to analyze
-     * @param  string      $preferred    Preferred delimiter characters
+     * @param string|null $preferred     Preferred delimiter characters
      * @param string|null $enclosure     Enclosure character, default is double quote (").
      *
-     * @return string The detected field delimiter
+     * @return string|false The detected field delimiter
      */
     public function auto($file = null, $parse = true, $search_depth = null, $preferred = null, $enclosure = null) {
         if (is_null($file)) {
@@ -496,54 +549,107 @@ class Csv {
             $data = &$this->file_data;
         }
 
+        $this->autoDetectionForDataString($data, $parse, $search_depth, $preferred, $enclosure);
+
+        return $this->delimiter;
+    }
+
+    public function autoDetectionForDataString($data, $parse = true, $search_depth = null, $preferred = null, $enclosure = null) {
+        $this->file_data = &$data;
         if (!$this->_detect_and_remove_sep_row_from_data($data)) {
             $this->_guess_delimiter($search_depth, $preferred, $enclosure, $data);
         }
 
         // parse data
         if ($parse) {
-            $this->data = $this->parse_string();
+            $this->data = $this->_parse_string();
         }
 
         return $this->delimiter;
     }
 
+    /**
+     * Get total number of data rows (exclusive heading line if present) in CSV
+     * without parsing the whole data string.
+     *
+     * @return bool|int
+     */
+    public function getTotalDataRowCount() {
+        if (empty($this->file_data)) {
+            return false;
+        }
+
+        $data = $this->file_data;
+
+        $this->_detect_and_remove_sep_row_from_data($data);
+
+        $pattern = sprintf('/%1$s[^%1$s]*%1$s/i', $this->enclosure);
+        preg_match_all($pattern, $data, $matches);
+
+        /** @var array[] $matches */
+        foreach ($matches[0] as $match) {
+            if (empty($match) || (strpos($match, $this->enclosure) === false)) {
+                continue;
+            }
+
+            $replace = str_replace(["\r", "\n"], '', $match);
+            $data = str_replace($match, $replace, $data);
+        }
+
+        $headingRow = $this->heading ? 1 : 0;
+
+        return substr_count($data, "\r")
+            + substr_count($data, "\n")
+            - substr_count($data, "\r\n")
+            - $headingRow;
+    }
+
     // ==============================================
     // ----- [ Core Functions ] ---------------------
     // ==============================================
 
     /**
      * Parse File
-     * Read file to string and call parse_string()
+     * Read file to string and call _parse_string()
      *
-     * @param  string|null $file Local CSV file
+     * @param string|null $file  Path to a CSV file.
+     *                           If configured in files such as php.ini,
+     *                           the path may also contain a protocol:
+     *                           https://example.org/some/file.csv
      *
      * @return array|bool
      */
-    public function parse_file($file = null) {
+    public function parseFile($file = null) {
         if (is_null($file)) {
             $file = $this->file;
         }
 
         if (empty($this->file_data)) {
+            /**
+             * @see self::keep_file_data
+             * Usually, _parse_string will clean this
+             * Instead of leaving stale data for the next parseFile call behind.
+             */
             $this->load_data($file);
         }
 
-        return !empty($this->file_data) ? $this->parse_string() : false;
+        return !empty($this->file_data) ? $this->_parse_string() : false;
     }
 
     /**
-     * Parse CSV strings to arrays. If you need BOM detection or character
+     * Internal function to parse CSV strings to arrays.
-     * encoding conversion, please call load_data() first, followed by a call to
+     *
-     * parse_string() with no parameters.
+     * If you need BOM detection or character encoding conversion, please call
+     * $csv->load_data($your_data_string) first, followed by a call to
+     * $csv->parse($csv->file_data).
      *
      * To detect field separators, please use auto() instead.
      *
-     * @param string $data CSV data
+     * @param string|null $data CSV data
      *
      * @return array|false - 2D array with CSV data, or false on failure
      */
-    public function parse_string($data = null) {
+    protected function _parse_string($data = null) {
         if (empty($data)) {
             if ($this->_check_data()) {
                 $data = &$this->file_data;
@@ -566,7 +672,7 @@ class Csv {
 
         // force the parser to process end of data as a character (false) when
         // data does not end with a line feed or carriage return character.
-        $lch = $data{$strlen - 1};
+        $lch = $data[$strlen - 1];
         if ($lch != "\n" && $lch != "\r") {
             $data .= "\n";
             $strlen++;
@@ -574,8 +680,8 @@ class Csv {
 
         // walk through each character
         for ($i = 0; $i < $strlen; $i++) {
-            $ch = isset($data{$i}) ? $data{$i} : false;
+            $ch = isset($data[$i]) ? $data[$i] : false;
-            $nch = isset($data{$i + 1}) ? $data{$i + 1} : false;
+            $nch = isset($data[$i + 1]) ? $data[$i + 1] : false;
 
             // open/close quotes, and inline quotes
             if ($ch == $this->enclosure) {
@@ -605,10 +711,10 @@ class Csv {
                     $i++;
                 } elseif ($nch != $this->delimiter && $nch != "\r" && $nch != "\n") {
                     $x = $i + 1;
-                    while (isset($data{$x}) && ltrim($data{$x}, $white_spaces) == '') {
+                    while (isset($data[$x]) && ltrim($data[$x], $white_spaces) == '') {
                         $x++;
                     }
-                    if ($data{$x} == $this->delimiter) {
+                    if ($data[$x] == $this->delimiter) {
                         $enclosed = false;
                         $i = $x;
                     } else {
@@ -638,9 +744,8 @@ class Csv {
                 } else {
                     $enclosed = false;
                 }
-
                 // end of field/row/csv
-            } elseif (($ch === $this->delimiter || $ch == "\n" || $ch == "\r" || $ch === false) && !$enclosed) {
+            } elseif ((in_array($ch, [$this->delimiter, "\n", "\r", false], true)) && !$enclosed) {
                 $key = !empty($head[$col]) ? $head[$col] : $col;
                 $row[$key] = $was_enclosed ? $current : trim($current);
                 $current = '';
@@ -648,7 +753,7 @@ class Csv {
                 $col++;
 
                 // end of row
-                if ($ch == "\n" || $ch == "\r" || $ch === false) {
+                if (in_array($ch, ["\n", "\r", false], true)) {
                     if ($this->_validate_offset($row_count) && $this->_validate_row_conditions($row, $this->conditions)) {
                         if ($this->heading && empty($head)) {
                             $head = $row;
@@ -694,13 +799,7 @@ class Csv {
 
         $this->titles = $head;
         if (!empty($this->sort_by)) {
-            $sort_type = SORT_REGULAR;
+            $sort_type = SortEnum::getSorting($this->sort_type);
-            if ($this->sort_type == 'numeric') {
-                $sort_type = SORT_NUMERIC;
-            } elseif ($this->sort_type == 'string') {
-                $sort_type = SORT_STRING;
-            }
-
             $this->sort_reverse ? krsort($rows, $sort_type) : ksort($rows, $sort_type);
 
             if ($this->offset !== null || $this->limit !== null) {
@@ -728,9 +827,12 @@ class Csv {
      *
      * @return string CSV data
      */
-    public function unparse($data = array(), $fields = array(), $append = false, $is_php = false, $delimiter = null) {
+    public function unparse($data = array(), $fields = array(), $append = FileProcessingModeEnum::MODE_FILE_OVERWRITE, $is_php = false, $delimiter = null) {
         if (!is_array($data) || empty($data)) {
             $data = &$this->data;
+        } else {
+            /** @noinspection ReferenceMismatchInspection */
+            $this->data = $data;
         }
 
         if (!is_array($fields) || empty($fields)) {
@@ -745,8 +847,16 @@ class Csv {
         $entry = array();
 
         // create heading
+        /** @noinspection ReferenceMismatchInspection */
+        $fieldOrder = $this->_validate_fields_for_unparse($fields);
+        if (!$fieldOrder && !empty($data)) {
+            $column_count = count($data[0]);
+            $columns = range(0, $column_count - 1, 1);
+            $fieldOrder = array_combine($columns, $columns);
+        }
+
         if ($this->heading && !$append && !empty($fields)) {
-            foreach ($fields as $key => $column_name) {
+            foreach ($fieldOrder as $column_name) {
                 $entry[] = $this->_enclose_value($column_name, $delimiter);
             }
 
@@ -756,7 +866,8 @@ class Csv {
 
         // create data
         foreach ($data as $key => $row) {
-            foreach ($row as $cell_value) {
+            foreach (array_keys($fieldOrder) as $index) {
+                $cell_value = $row[$index];
                 $entry[] = $this->_enclose_value($cell_value, $delimiter);
             }
 
@@ -765,40 +876,140 @@ class Csv {
         }
 
         if ($this->convert_encoding) {
-            $string = iconv($this->input_encoding, $this->output_encoding, $string);
+            /** @noinspection PhpComposerExtensionStubsInspection
+             *
+             * If you receive an error at the following 3 lines, you must enable
+             * the following PHP extension:
+             *
+             *  - if $use_mb_convert_encoding is true: mbstring
+             *  - if $use_mb_convert_encoding is false: iconv
+             */
+            $string = $this->use_mb_convert_encoding ?
+                mb_convert_encoding($string, $this->output_encoding, $this->input_encoding) :
+                iconv($this->input_encoding, $this->output_encoding, $string);
         }
 
         return $string;
     }
 
     /**
-     * Load local file or string
+     * @param array $fields
      *
-     * @param string|null $input local CSV file
+     * @return array|false
-     *
-     * @return  true or false
      */
-    public function load_data($input = null) {
+    private function _validate_fields_for_unparse(array $fields) {
-        $data = null;
+        if (empty($fields)) {
-        $file = null;
+            $fields = $this->titles;
-
-        if (is_null($input)) {
-            $file = $this->file;
-        } elseif (file_exists($input)) {
-            $file = $input;
-        } else {
-            $data = $input;
         }
 
-        if (!empty($data) || $data = $this->_rfile($file)) {
+        if (empty($fields)) {
+            return array();
+        }
+
+        // this is needed because sometime titles property is overwritten instead of using fields parameter!
+        $titlesOnParse = !empty($this->data) ? array_keys(reset($this->data)) : array();
+
+        // both are identical, also in ordering OR we have no data (only titles)
+        if (empty($titlesOnParse) || array_values($fields) === array_values($titlesOnParse)) {
+            return array_combine($fields, $fields);
+        }
+
+        // if renaming given by: $oldName => $newName (maybe with reorder and / or subset):
+        // todo: this will only work if titles are unique
+        $fieldOrder = array_intersect(array_flip($fields), $titlesOnParse);
+        if (!empty($fieldOrder)) {
+            return array_flip($fieldOrder);
+        }
+
+        $fieldOrder = array_intersect($fields, $titlesOnParse);
+        if (!empty($fieldOrder)) {
+            return array_combine($fieldOrder, $fieldOrder);
+        }
+
+        // original titles are not given in fields. that is okay if count is okay.
+        if (count($fields) != count($titlesOnParse)) {
+            throw new \UnexpectedValueException(
+                "The specified fields do not match any titles and do not match column count.\n" .
+                "\$fields was " . print_r($fields, true) .
+                "\$titlesOnParse was " . print_r($titlesOnParse, true));
+        }
+
+        return array_combine($titlesOnParse, $fields);
+    }
+
+    /**
+     * Load local file or string.
+     *
+     * Only use this function if auto() and parse() don't handle your data well.
+     *
+     * This function load_data() is able to handle BOMs and encodings. The data
+     * is stored within the $this->file_data class field.
+     *
+     * @param string|null $input  CSV file path or CSV data as a string
+     *
+     *                            Supplying CSV data (file content) here is deprecated.
+     *                            For CSV data, please use loadDataString().
+     *                            Support for CSV data will be removed in v2.0.0.
+     *
+     * @return bool  True on success
+     * @deprecated Use loadDataString() or loadFile() instead.
+     */
+    public function load_data($input = null) {
+        return $this->loadFile($input);
+    }
+
+    /**
+     * Load a file, but don't parse it.
+     *
+     * Only use this function if auto() and parseFile() don't handle your data well.
+     *
+     * This function is able to handle BOMs and encodings. The data
+     * is stored within the $this->file_data class field.
+     *
+     * @param string|null $file  CSV file path
+     *
+     * @return bool  True on success
+     */
+    public function loadFile($file = null) {
+        $data = null;
+
+        if (is_null($file)) {
+            $data = $this->_rfile($this->file);
+        } elseif (\strlen($file) <= PHP_MAXPATHLEN && file_exists($file)) {
+            $data = $this->_rfile($file);
             if ($this->file != $file) {
                 $this->file = $file;
             }
+        } else {
+            // It is CSV data as a string.
 
-            if (preg_match('/\.php$/i', $file) && preg_match('/<\?.*?\?>(.*)/ms', $data, $strip)) {
+            // WARNING:
-                $data = ltrim($strip[1]);
+            // Supplying CSV data to load_data() will no longer
+            // be supported in a future version of ParseCsv.
+            // This function will return false for invalid paths from v2.0.0 onwards.
+
+            // Use ->loadDataString() instead.
+
+            $data = $file;
         }
 
+        return $this->loadDataString($data);
+    }
+
+    /**
+     * Load a data string, but don't parse it.
+     *
+     * Only use this function if autoDetectionForDataString() and parse() don't handle your data well.
+     *
+     * This function is able to handle BOMs and encodings. The data
+     * is stored within the $this->file_data class field.
+     *
+     * @param string|null $file_path  CSV file path
+     *
+     * @return bool  True on success
+     */
+    public function loadDataString($data) {
+        if (!empty($data)) {
             if (strpos($data, "\xef\xbb\xbf") === 0) {
                 // strip off BOM (UTF-8)
                 $data = substr($data, 3);
@@ -814,6 +1025,14 @@ class Csv {
             }
 
             if ($this->convert_encoding && $this->input_encoding !== $this->output_encoding) {
+                /** @noinspection PhpComposerExtensionStubsInspection
+                 *
+                 * If you receive an error at the following 3 lines, you must enable
+                 * the following PHP extension:
+                 *
+                 *  - if $use_mb_convert_encoding is true: mbstring
+                 *  - if $use_mb_convert_encoding is false: iconv
+                 */
                 $data = $this->use_mb_convert_encoding ?
                     mb_convert_encoding($data, $this->output_encoding, $this->input_encoding) :
                     iconv($this->input_encoding, $this->output_encoding, $data);
@@ -840,7 +1059,7 @@ class Csv {
      * @param array       $row        array with values from a row
      * @param string|null $conditions specified conditions that the row must match
      *
-     * @return  true of false
+     * @return bool
      */
     protected function _validate_row_conditions($row = array(), $conditions = null) {
         if (!empty($row)) {
@@ -883,12 +1102,19 @@ class Csv {
      */
     protected function _validate_row_condition($row, $condition) {
         $operators = array(
-            '=', 'equals', 'is',
+            '=',
-            '!=', 'is not',
+            'equals',
-            '<', 'is less than',
+            'is',
-            '>', 'is greater than',
+            '!=',
-            '<=', 'is less than or equals',
+            'is not',
-            '>=', 'is greater than or equals',
+            '<',
+            'is less than',
+            '>',
+            'is greater than',
+            '<=',
+            'is less than or equals',
+            '>=',
+            'is greater than or equals',
             'contains',
             'does not contain',
         );
@@ -903,11 +1129,22 @@ class Csv {
 
         if (preg_match('/^(.+) (' . $operators_regex . ') (.+)$/i', trim($condition), $capture)) {
             $field = $capture[1];
-            $op = $capture[2];
+            $op = strtolower($capture[2]);
             $value = $capture[3];
+            if ($op == 'equals' && preg_match('/^(.+) is (less|greater) than or$/i', $field, $m)) {
+                $field = $m[1];
+                $op = strtolower($m[2]) == 'less' ? '<=' : '>=';
+            }
+            if ($op == 'is' && preg_match('/^(less|greater) than (.+)$/i', $value, $m)) {
+                $value = $m[2];
+                $op = strtolower($m[1]) == 'less' ? '<' : '>';
+            }
+            if ($op == 'is' && preg_match('/^not (.+)$/i', $value, $m)) {
+                $value = $m[1];
+                $op = '!=';
+            }
 
-            if (preg_match('/^([\'\"]{1})(.*)([\'\"]{1})$/', $value, $capture)) {
+            if (preg_match('/^([\'"])(.*)([\'"])$/', $value, $capture) && $capture[1] == $capture[3]) {
-                if ($capture[1] == $capture[3]) {
                 $value = strtr($capture[2], array(
                     "\\n" => "\n",
                     "\\r" => "\r",
@@ -916,10 +1153,10 @@ class Csv {
 
                 $value = stripslashes($value);
             }
-            }
 
             if (array_key_exists($field, $row)) {
-                if (($op == '=' || $op == 'equals' || $op == 'is') && $row[$field] == $value) {
+                $op_equals = in_array($op, ['=', 'equals', 'is'], true);
+                if ($op_equals && $row[$field] == $value) {
                     return '1';
                 } elseif (($op == '!=' || $op == 'is not') && $row[$field] != $value) {
                     return '1';
@@ -949,7 +1186,7 @@ class Csv {
      *
      * @param int $current_row the current row number being processed
      *
-     * @return  true of false
+     * @return bool
      */
     protected function _validate_offset($current_row) {
         return
@@ -963,19 +1200,19 @@ class Csv {
      * Enclose values if needed
      *  - only used by unparse()
      *
-     * @param string $value     Cell value to process
+     * @param string|null $value     Cell value to process
      * @param string      $delimiter Character to put between cells on the same row
      *
      * @return string Processed value
      */
-    protected function _enclose_value($value = null, $delimiter) {
+    protected function _enclose_value($value, $delimiter) {
         if ($value !== null && $value != '') {
             $delimiter_quoted = $delimiter ?
                 preg_quote($delimiter, '/') . "|"
                 : '';
             $enclosure_quoted = preg_quote($this->enclosure, '/');
             $pattern = "/" . $delimiter_quoted . $enclosure_quoted . "|\n|\r/i";
-            if ($this->enclose_all || preg_match($pattern, $value) || ($value{0} == ' ' || substr($value, -1) == ' ')) {
+            if ($this->enclose_all || preg_match($pattern, $value) || strpos($value, ' ') === 0 || substr($value, -1) == ' ') {
                 $value = str_replace($this->enclosure, $this->enclosure . $this->enclosure, $value);
                 $value = $this->enclosure . $value . $this->enclosure;
             }
@@ -1046,21 +1283,26 @@ class Csv {
     }
 
     /**
-     * Read local file
+     * Read local file.
      *
-     * @param string|null $file local filename
+     * @param string $filePath  local filename
      *
      * @return string|false Data from file, or false on failure
      */
-    protected function _rfile($file = null) {
+    protected function _rfile($filePath) {
-        if (is_readable($file)) {
+        if (is_readable($filePath)) {
-            if (!($fh = fopen($file, 'r'))) {
+            $data = file_get_contents($filePath);
+            if ($data === false) {
                 return false;
             }
 
-            $data = fread($fh, filesize($file));
+            if (preg_match('/\.php$/i', $filePath) && preg_match('/<\?.*?\?>(.*)/ms', $data, $strip)) {
-            fclose($fh);
+                // Return section behind closing tags.
-            return $data;
+                // This parsing is deprecated and will be removed in v2.0.0.
+                $data = ltrim($strip[1]);
+            }
+
+            return rtrim($data, "\r\n");
         }
 
         return false;
@@ -1074,7 +1316,9 @@ class Csv {
      * @param string $mode    fopen() mode
      * @param int    $lock    flock() mode
      *
-     * @return  true or false
+     * @return bool
+     *   True on success
+     *
      */
     protected function _wfile($file, $content = '', $mode = 'wb', $lock = LOCK_EX) {
         if ($fp = fopen($file, $mode)) {
@@ -1095,7 +1339,7 @@ class Csv {
      * first line containing only "sep=;", where the last character is the
      * separator. Microsoft Excel is able to open such files.
      *
-     * @param string $data    file data
+     * @param string $data file data
      *
      * @return string|false detected delimiter, or false if none found
      */
@@ -1113,7 +1357,7 @@ class Csv {
     /**
      * Support for Excel-compatible sep=? row.
      *
-     * @param string $data_string    file data to be updated
+     * @param string $data_string file data to be updated
      *
      * @return bool TRUE if sep= line was found at the very beginning of the file
      */
@@ -1136,7 +1380,6 @@ class Csv {
         }
 
         // remove delimiter and its line-end (the data param is by-ref!)
-        /** @noinspection CallableParameterUseCaseInTypeContextInspection */
         $data_string = substr($data_string, $pos);
         return true;
     }
@@ -1147,7 +1390,7 @@ class Csv {
      * @param string $enclosure    Enclosure character, default is double quote
      * @param string $data         The file content
      */
-    protected function _guess_delimiter($search_depth, $preferred, $enclosure, &$data) {
+    protected function _guess_delimiter($search_depth, $preferred, $enclosure, $data) {
         $chars = [];
         $strlen = strlen($data);
         $enclosed = false;
@@ -1162,9 +1405,9 @@ class Csv {
 
         // walk specific depth finding possible delimiter characters
         for ($i = 0; $i < $strlen; $i++) {
-            $ch = $data{$i};
+            $ch = $data[$i];
-            $nch = isset($data{$i + 1}) ? $data{$i + 1} : false;
+            $nch = isset($data[$i + 1]) ? $data[$i + 1] : false;
-            $pch = isset($data{$i - 1}) ? $data{$i - 1} : false;
+            $pch = isset($data[$i - 1]) ? $data[$i - 1] : false;
 
             // open and closing quotes
             $is_newline = ($ch == "\n" && $pch != "\r") || $ch == "\r";
@@ -1209,4 +1452,29 @@ class Csv {
         ksort($filtered);
         $this->delimiter = reset($filtered);
     }
+
+    /**
+     * getCollection
+     * Returns a Illuminate/Collection object
+     * This may prove to be helpful to people who want to
+     * create macros, and or use map functions
+     *
+     * @access public
+     * @link   https://laravel.com/docs/5.6/collections
+     *
+     * @throws \ErrorException - If the Illuminate\Support\Collection class is not found
+     *
+     * @return Collection
+     */
+    public function getCollection() {
+        //does the Illuminate\Support\Collection class exists?
+        //this uses the autoloader to try to determine
+        //@see http://php.net/manual/en/function.class-exists.php
+        if (class_exists('Illuminate\Support\Collection', true) == false) {
+            throw new \ErrorException('It would appear you have not installed the illuminate/support package!');
+        }
+
+        //return the collection
+        return new Collection($this->data);
+    }
 }

src/enums/AbstractEnum.php

@@ -0,0 +1,38 @@
+<?php
+
+namespace ParseCsv\enums;
+
+abstract class AbstractEnum {
+
+    /**
+     * Creates a new value of some type
+     *
+     * @param mixed $value
+     *
+     * @throws \UnexpectedValueException if incompatible type is given.
+     */
+    public function __construct($value) {
+        if (!$this->isValid($value)) {
+            throw new \UnexpectedValueException("Value '$value' is not part of the enum " . get_called_class());
+        }
+        $this->value = $value;
+    }
+
+    public static function getConstants() {
+        $class = get_called_class();
+        $reflection = new \ReflectionClass($class);
+
+        return $reflection->getConstants();
+    }
+
+    /**
+     * Check if enum value is valid
+     *
+     * @param $value
+     *
+     * @return bool
+     */
+    public static function isValid($value) {
+        return in_array($value, static::getConstants(), true);
+    }
+}

src/enums/DatatypeEnum.php

@@ -9,7 +9,7 @@ namespace ParseCsv\enums;
  *
  * todo: needs a basic parent enum class for error handling.
  */
-class DatatypeEnum {
+class DatatypeEnum extends AbstractEnum {
 
     const __DEFAULT = self::TYPE_STRING;
 

src/enums/FileProcessingModeEnum.php

@@ -0,0 +1,28 @@
+<?php
+
+namespace ParseCsv\enums;
+
+
+/**
+ * Class FileProcessingEnum
+ *
+ * @package ParseCsv\enums
+ *
+ * todo extends a basic enum class after merging #121
+ */
+class FileProcessingModeEnum {
+
+    const __default = self::MODE_FILE_OVERWRITE;
+
+    const MODE_FILE_APPEND = true;
+
+    const MODE_FILE_OVERWRITE = false;
+
+    public static function getAppendMode($mode) {
+        if ($mode == self::MODE_FILE_APPEND) {
+            return 'ab';
+        }
+
+        return 'wb';
+    }
+}

src/enums/SortEnum.php

@@ -0,0 +1,29 @@
+<?php
+
+namespace ParseCsv\enums;
+
+
+class SortEnum extends AbstractEnum {
+
+    const __DEFAULT = self::SORT_TYPE_REGULAR;
+
+    const SORT_TYPE_REGULAR = 'regular';
+
+    const SORT_TYPE_NUMERIC = 'numeric';
+
+    const SORT_TYPE_STRING = 'string';
+
+    private static $sorting = array(
+        self::SORT_TYPE_REGULAR => SORT_REGULAR,
+        self::SORT_TYPE_STRING => SORT_STRING,
+        self::SORT_TYPE_NUMERIC => SORT_NUMERIC,
+    );
+
+    public static function getSorting($type) {
+        if (array_key_exists($type, self::$sorting)) {
+            return self::$sorting[$type];
+        }
+
+        return self::$sorting[self::__DEFAULT];
+    }
+}

src/extensions/DatatypeTrait.php

@@ -2,13 +2,15 @@
 
 namespace ParseCsv\extensions;
 
+use ParseCsv\enums\DatatypeEnum;
+
 trait DatatypeTrait {
 
     /**
-     * Datatypes
+     * Data Types
-     * Datatypes of CSV data-columns
+     * Data types of CSV data-columns, keyed by the column name. Possible values
+     * are string, float, integer, boolean, date. See DatatypeEnum.
      *
-     * @access public
      * @var array
      */
     public $data_types = [];
@@ -17,8 +19,6 @@ trait DatatypeTrait {
      * Check data type for one column.
      * Check for most commonly data type for one column.
      *
-     * @access private
-     *
      * @param array $datatypes
      *
      * @return string|false
@@ -36,7 +36,6 @@ trait DatatypeTrait {
         reset($typesFreq);
 
         return key($typesFreq);
-
     }
 
     /**
@@ -45,15 +44,13 @@ trait DatatypeTrait {
      *
      * Requires PHP >= 5.5
      *
-     * @access public
+     * @uses   DatatypeEnum::getValidTypeFromSample
-     *
-     * @uses   getDatatypeFromString
      *
      * @return array|bool
      */
     public function getDatatypes() {
         if (empty($this->data)) {
-            $this->data = $this->parse_string();
+            $this->data = $this->_parse_string();
         }
         if (!is_array($this->data)) {
             throw new \UnexpectedValueException('No data set yet.');
@@ -62,7 +59,7 @@ trait DatatypeTrait {
         $result = [];
         foreach ($this->titles as $cName) {
             $column = array_column($this->data, $cName);
-            $cDatatypes = array_map('ParseCsv\enums\DatatypeEnum::getValidTypeFromSample', $column);
+            $cDatatypes = array_map(DatatypeEnum::class . '::getValidTypeFromSample', $column);
 
             $result[$cName] = $this->getMostFrequentDatatypeForColumn($cDatatypes);
         }
@@ -71,4 +68,35 @@ trait DatatypeTrait {
 
         return !empty($this->data_types) ? $this->data_types : [];
     }
+
+    /**
+     * Check data type of titles / first row for auto detecting if this could be
+     * a heading line.
+     *
+     * Requires PHP >= 5.5
+     *
+     * @uses   DatatypeEnum::getValidTypeFromSample
+     *
+     * @return bool
+     */
+    public function autoDetectFileHasHeading() {
+        if (empty($this->data)) {
+            throw new \UnexpectedValueException('No data set yet.');
+        }
+
+        if ($this->heading) {
+            $firstRow = $this->titles;
+        } else {
+            $firstRow = $this->data[0];
+        }
+
+        $firstRow = array_filter($firstRow);
+        if (empty($firstRow)) {
+            return false;
+        }
+
+        $firstRowDatatype = array_map(DatatypeEnum::class . '::getValidTypeFromSample', $firstRow);
+
+        return $this->getMostFrequentDatatypeForColumn($firstRowDatatype) === DatatypeEnum::TYPE_STRING;
+    }
 }

tests/Bootstrap.php

@@ -1,13 +1,8 @@
 <?php
+
 chdir(__DIR__ . '/..');
 if (!file_exists('vendor/autoload.php')) {
     `composer dump-autoload`;
 }
 
 require __DIR__ . '/../vendor/autoload.php';
-
-if (!class_exists('PHPUnit\Framework\TestCase') && class_exists('PHPUnit_Framework_TestCase')) {
-    // we run on an older PHPUnit version without namespaces.
-    require_once __DIR__ . '/PHPUnit_Framework_TestCase.inc.php';
-}
-

tests/PHPUnit_Framework_TestCase.inc.php

@@ -1,11 +0,0 @@
-<?php
-
-namespace PHPUnit\Framework;
-
-// Only needed to keep unit test code compatible with older PHPUnit versions
-
-/** @noinspection PhpUndefinedClassInspection */
-/** @noinspection AutoloadingIssuesInspection */
-class TestCase extends \PHPUnit_Framework_TestCase {
-
-}

tests/example_files/multiple_empty_lines.csv

@@ -0,0 +1,22 @@
+ID,dID,createdAt,else1,else2,else3,else4,else5,user,else6,else7,else8,else9,else10,else11,else12,else13,else14,else15,else16,else17,else18,else19,else20,else21,else22,else23,else24,else25,else26,else27,else28,else29,else30,else31,else32,else33,else34,else35,else36,else37,else38
+418,0,2017-05-16,,,2018-01-22,22.01.2018 10:00:09,,admin,Ja,,10001,Abweichung,,10001,v1,1,ddd,100,1000,,HH,,v1,0,401,1,2,H1,,-1,10,1,111,Ja,2017-01-01,,12,0,11109,HH-100,default
+419,0,2017-05-16,,,2017-05-16,14.07.2017 09:58:09,,admin,Ja,,,Abweichung,,10002,v2,1,ddd,200,500,DD,DD,,v2,1,402,2,4,H2,,-2,100,1,1111,Ja,2017-01-01,1,13,1,11109,DD-200,default 
+438,0,2017-05-16,,,2017-05-16,14.07.2017 09:58:29,,admin,Ja,,10021,Abweichung,,10021,v3,4,ddd,300,400,DD,DD,,v3,0,421,1,,H3,,-1,106,1,111,Ja,2017-05-08,,2,1,11109,DD-300,default
+440,0,2017-05-16,,,,14.07.2017 09:58:53,,admin,Ja,,,Alt,,10023,v4,3,,400,500,BE,DD,,v4,1,423,3,,H4,,-3,143,1,1111,Ja,2017-01-01,1,33,1,11108,BE-400,default
+441,0,2017-05-16,,,,14.07.2017 09:59:19,,admin,Ja,,,Fehlt,,10024,v5,3,,500,,BE,,,v5,2,424,4,,H5,,0,1435,0,111,Ja,2017-01-01,,12,1,0,BE-500,default
+442,0,2017-05-16,,,,14.07.2017 10:00:46,,admin,Ja,,,Neu,,10025,v6,3,,100,,DD,,,v6,435,425,1,,H6,,0,10,0,1111,Ja,2017-01-01,,102,1,0,DD-100,default
+443,0,2017-05-16,,,2017-07-04,14.07.2017 10:01:12,,admin,Ja,,,OK,,10026,v7,3,,200,200,DD,DD,,v7,32,426,2,2,H7,,0,100,0,111,Ja,2017-01-01,,77,1,0,DD-200,default
+444,0,2017-05-16,,,,14.07.2017 10:02:13,,admin,Ja,,,Fehlt,,10027,v8,3,,300,,BE,,,v8,45,427,3,,H8,,0,200,0,1111,Ja,2017-01-01,,44,3,0,BE-300,default
+445,0,2017-05-16,,,,14.07.2017 10:02:38,,admin,Ja,,,Fehlt,,10028,v9,3,,100,,BE,,,v9,45,428,4,,H9,,0,400,0,111,Ja,2017-01-01,,44,1,0,BE-100,default
+446,0,2017-05-16,,,,14.07.2017 10:03:01,,admin,Ja,,,Fehlt,,10029,v10,3,,,400,,DD,,v10,45,429,,,H10,,0,1124,0,1111,Ja,2017-01-01,,89,1,0,,default
+
+
+
+
+
+
+
+
+
+
+

tests/example_files/waiver_field_separator.csv

@@ -0,0 +1,6 @@
+keyword
+liability waiver
+release of liability form
+release of liability
+sample waiver
+sample waiver form

tests/methods/ConstructTest.php

@@ -58,8 +58,11 @@ class ConstructTest extends TestCase {
             ob_start();
             /** @noinspection PhpIncludeInspection */
             require $script_file;
-            if ($script_file != 'download.php') {
+            $ob_get_clean = ob_get_clean();
-                $this->assertContains('<td>', ob_get_clean());
+            $verb = strtok($script_file, '_.');
+
+            if (!in_array($verb, ['download', 'save'], true)) {
+                $this->assertContains('<td>', $ob_get_clean);
             }
         }
         chdir('..');

tests/methods/DataRowCountTest.php

@@ -0,0 +1,80 @@
+<?php
+
+namespace ParseCsv\tests\methods;
+
+use ParseCsv\Csv;
+use PHPUnit\Framework\TestCase;
+
+
+class DataRowCountTest extends TestCase {
+
+    /**
+     * CSV
+     * The CSV object
+     *
+     * @access protected
+     * @var Csv
+     */
+    protected $csv;
+
+    protected function setUp(): void {
+        $this->csv = new Csv();
+    }
+
+    public function countRowsProvider() {
+        return [
+            'auto-double-enclosure' => [
+                'auto-double-enclosure.csv',
+                2,
+            ],
+            'auto-single-enclosure' => [
+                'auto-single-enclosure.csv',
+                2,
+            ],
+            'UTF-8_sep_row' => [
+                'datatype.csv',
+                3,
+            ],
+        ];
+    }
+
+    /**
+     * @dataProvider countRowsProvider
+     *
+     * @param string $file
+     * @param int    $expectedRows
+     */
+    public function testGetTotalRowCountFromFile($file, $expectedRows) {
+        $this->csv->heading = true;
+        $this->csv->load_data(__DIR__ . '/fixtures/' . $file);
+        self::assertEquals($expectedRows, $this->csv->getTotalDataRowCount());
+    }
+
+    public function testGetTotalRowCountMissingEndingLineBreak() {
+        $this->csv->heading = false;
+        $this->csv->enclosure = '"';
+        $sInput = "86545235689,a\r\n34365587654,b\r\n13469874576,\"c\r\nd\"";
+        $this->csv->loadDataString($sInput);
+        self::assertEquals(3, $this->csv->getTotalDataRowCount());
+    }
+
+    public function testGetTotalRowCountSingleEnclosure() {
+        $this->csv->heading = false;
+        $this->csv->enclosure = "'";
+        $sInput = "86545235689,a\r\n34365587654,b\r\n13469874576,\'c\r\nd\'";
+        $this->csv->loadDataString($sInput);
+        $this->assertEquals(3, $this->csv->getTotalDataRowCount());
+    }
+
+    public function testGetTotalRowCountSingleRow() {
+        $this->csv->heading = false;
+        $this->csv->enclosure = "'";
+        $sInput = "86545235689";
+        $this->csv->loadDataString($sInput);
+        $this->assertEquals(1, $this->csv->getTotalDataRowCount());
+    }
+
+    public function testGetTotalRowCountNoData() {
+        self::assertFalse($this->csv->getTotalDataRowCount());
+    }
+}

tests/methods/DatatypeTest.php

@@ -8,11 +8,11 @@
 
 namespace ParseCsv\tests\methods;
 
-use PHPUnit\Framework\TestCase;
 use ParseCsv\enums\DatatypeEnum;
+use PHPUnit\Framework\TestCase;
+
+class DatatypeTest extends TestCase {
 
-class DatatypeTest extends TestCase
-{
     public function testSampleIsValidInteger() {
         $this->assertEquals(DatatypeEnum::TYPE_INT, DatatypeEnum::getValidTypeFromSample('1'));
         $this->assertEquals(DatatypeEnum::TYPE_INT, DatatypeEnum::getValidTypeFromSample('+1'));

tests/methods/ExampleStream.php

@@ -0,0 +1,100 @@
+<?php
+
+namespace ParseCsv\tests\methods;
+
+/**
+ * This is a very simple implementation of a stream wrapper. All URLs are mapped
+ * to just one buffer. It exists to prove that ParseCsv can read and write
+ * streams.
+ *
+ * @see https://www.php.net/manual/en/class.streamwrapper.php
+ */
+class ExampleStream {
+
+    private static $position = 0;
+
+    private static $stream_content;
+
+    public function stream_open($uri, $mode) {
+        if (strpos($mode, 'a') === false) {
+            self::$position = 0;
+        }
+        if (strpos($mode, 'w') !== false) {
+            self::$stream_content = '';
+        }
+        return true;
+    }
+
+    public function stream_read($count) {
+        $ret = substr(self::$stream_content, self::$position, $count);
+        self::$position += strlen($ret);
+        return $ret;
+    }
+
+    public function stream_write($data) {
+        $left = substr(self::$stream_content, 0, self::$position);
+        $right = substr(self::$stream_content, self::$position + strlen($data));
+        self::$stream_content = $left . $data . $right;
+        self::$position += strlen($data);
+        return strlen($data);
+    }
+
+    public function stream_stat() {
+        return ['size' => strlen(self::$stream_content)];
+    }
+
+
+    public function stream_tell() {
+        return self::$position;
+    }
+
+    public function stream_eof() {
+        return self::$position >= strlen(self::$stream_content);
+    }
+
+    public function url_stat() {
+        return ['size' => strlen(self::$stream_content)];
+    }
+
+    public function stream_seek($offset, $whence) {
+        switch ($whence) {
+            case SEEK_SET:
+                if ($offset < strlen(self::$stream_content) && $offset >= 0) {
+                    self::$position = $offset;
+                    return true;
+                } else {
+                    return false;
+                }
+                break;
+
+            case SEEK_CUR:
+                if ($offset >= 0) {
+                    self::$position += $offset;
+                    return true;
+                } else {
+                    return false;
+                }
+                break;
+
+            case SEEK_END:
+                if (strlen(self::$stream_content) + $offset >= 0) {
+                    self::$position = strlen(self::$stream_content) + $offset;
+                    return true;
+                } else {
+                    return false;
+                }
+                break;
+
+            default:
+                return false;
+        }
+    }
+
+    public function stream_lock($operation) {
+        return true;
+    }
+
+    public function stream_metadata() {
+        return false;
+    }
+}

tests/methods/ObjectThatHasToStringMethod.php

@@ -0,0 +1,13 @@
+<?php
+
+namespace ParseCsv\tests\methods;
+
+/**
+ * Class HasToString is just a helper to test if cells can be objects.
+ */
+class ObjectThatHasToStringMethod {
+
+    public function __toString() {
+        return 'some value';
+    }
+}

tests/methods/OldRequireTest.php

@@ -4,25 +4,40 @@ namespace ParseCsv\tests\methods;
 
 use PHPUnit\Framework\TestCase;
 
+/**
+ * This test checks for backwards compatibility: Does it work to
+ *   - require the old "parsecsv.lib.php" instead of composer autoloading?
+ *   - use the old class name "parseCSV"?
+ */
 class OldRequireTest extends TestCase {
 
-    protected function setUp() {
+    protected function setUp(): void {
         rename('vendor/autoload.php', '__autoload');
     }
 
-    protected function tearDown() {
+    protected function tearDown(): void {
         rename('__autoload', 'vendor/autoload.php');
     }
 
     /**
-     * @runInSeparateProcess because download.php uses header()
+     * @runInSeparateProcess so that disabled autoloading has an effect
      */
     public function testOldLibWithoutComposer() {
-
         file_put_contents('__eval.php', '<?php require "parsecsv.lib.php"; new \ParseCsv\Csv;');
         exec("php __eval.php", $output, $return_var);
         unlink('__eval.php');
         $this->assertEquals($output, []);
         $this->assertEquals(0, $return_var);
     }
+
+    /**
+     * @runInSeparateProcess so that disabled autoloading has an effect
+     */
+    public function testOldLibWithOldClassName() {
+        file_put_contents('__eval.php', '<?php require "parsecsv.lib.php"; new parseCSV;');
+        exec("php __eval.php", $output, $return_var);
+        unlink('__eval.php');
+        $this->assertEquals($output, []);
+        $this->assertEquals(0, $return_var);
+    }
 }

tests/methods/OutputTest.php

@@ -0,0 +1,23 @@
+<?php
+
+namespace ParseCsv\tests\methods;
+
+use ParseCsv\Csv;
+use PHPUnit\Framework\TestCase;
+
+class OutputTest extends TestCase {
+
+    /**
+     * @runInSeparateProcess because download.php uses header()
+     */
+    public function testOutputWithFourParameters() {
+        $csv = new Csv();
+        $data = [0 => ['a', 'b', 'c'], 1 => ['d', 'e', 'f']];
+        $fields = ['col1', 'col2', 'col3'];
+        ob_start();
+        $output = $csv->output('test.csv', $data, $fields, ',');
+        $expected = "col1,col2,col3\ra,b,c\rd,e,f\r";
+        self::assertEquals($expected, ob_get_clean());
+        self::assertEquals($expected, $output);
+    }
+}

tests/methods/ParseTest.php

@@ -4,6 +4,7 @@ namespace ParseCsv\tests\methods;
 
 use ParseCsv\Csv;
 use PHPUnit\Framework\TestCase;
+use ReflectionClass;
 
 class ParseTest extends TestCase {
 
@@ -18,32 +19,37 @@ class ParseTest extends TestCase {
      *
      * @access public
      */
-    public function setUp() {
+    protected function setUp(): void {
         $this->csv = new Csv();
     }
 
-    public function test_parse() {
+    public function testParse() {
         // can we trick 'is_readable' into whining? See #67.
-        $this->parse_repetitive_string('c:/looks/like/a/path');
+        $this->parseRepetitiveString('c:/looks/like/a/path');
-        $this->parse_repetitive_string('http://looks/like/an/url');
+        $this->parseRepetitiveString('http://looks/like/an/url');
     }
 
-    private function parse_repetitive_string($content) {
+    /**
+     * @param string $content
+     */
+    private function parseRepetitiveString($content) {
         $this->csv->delimiter = ';';
         $this->csv->heading = false;
         $success = $this->csv->parse(str_repeat($content . ';', 500));
-        $this->assertEquals(true, $success);
+        self::assertEquals(true, $success);
 
         $row = array_pop($this->csv->data);
         $expected_data = array_fill(0, 500, $content);
         $expected_data[] = '';
-        $this->assertEquals($expected_data, $row);
+        self::assertEquals($expected_data, $row);
     }
 
     /**
-     * @depends      test_parse
+     * @depends      testParse
      *
      * @dataProvider autoDetectionProvider
+     *
+     * @param string $file
      */
     public function testSepRowAutoDetection($file) {
         // This file (parse_test.php) is encoded in UTF-8, hence comparison will
@@ -51,9 +57,12 @@ class ParseTest extends TestCase {
         $this->csv->output_encoding = 'UTF-8';
 
         $this->csv->auto($file);
-        $this->assertEquals($this->_get_magazines_data(), $this->csv->data);
+        self::assertEquals($this->_get_magazines_data(), $this->csv->data);
     }
 
+    /**
+     * @return array
+     */
     public function autoDetectionProvider() {
         return [
             'UTF8_no_BOM' => [__DIR__ . '/../example_files/UTF-8_sep_row_but_no_BOM.csv'],
@@ -64,20 +73,22 @@ class ParseTest extends TestCase {
 
     public function testSingleColumnWithZeros() {
         $this->csv->delimiter = null;
-        $this->csv->parse("URL\nhttp://www.amazon.com/ROX-Ice-Ball-Maker-Original/dp/B00MX59NMQ/ref=sr_1_1?ie=UTF8&qid=1435604374&sr=8-1&keywords=rox,+ice+molds");
+        $this->csv->parse(
+            "URL\nhttp://www.amazon.com/ROX-Ice-Ball-Maker-Original/dp/B00MX59NMQ/ref=sr_1_1?ie=UTF8&qid=1435604374&sr=8-1&keywords=rox,+ice+molds"
+        );
         $row = array_pop($this->csv->data);
         $expected_data = ['URL' => 'http://www.amazon.com/ROX-Ice-Ball-Maker-Original/dp/B00MX59NMQ/ref=sr_1_1?ie=UTF8&qid=1435604374&sr=8-1&keywords=rox,+ice+molds'];
-        $this->assertEquals($expected_data, $row);
+        self::assertEquals($expected_data, $row);
     }
 
     public function testAllNumericalCsv() {
         $this->csv->heading = false;
         $sInput = "86545235689\r\n34365587654\r\n13469874576";
-        $this->assertEquals(false, $this->csv->auto($sInput));
+        self::assertEquals(false, $this->csv->autoDetectionForDataString($sInput));
-        $this->assertEquals(null, $this->csv->delimiter);
+        self::assertEquals(null, $this->csv->delimiter);
         $expected_data = explode("\r\n", $sInput);
         $actual_data = array_map('reset', $this->csv->data);
-        $this->assertEquals($expected_data, $actual_data);
+        self::assertEquals($expected_data, $actual_data);
     }
 
     public function testMissingEndingLineBreak() {
@@ -85,17 +96,21 @@ class ParseTest extends TestCase {
         $this->csv->enclosure = '"';
         $sInput = "86545235689,a\r\n34365587654,b\r\n13469874576,\"c\r\nd\"";
         $expected_data = [86545235689, 34365587654, 13469874576];
-        $actual_data = $this->csv->parse_string($sInput);
+
+        $actual_data = $this->invokeMethod($this->csv, '_parse_string', [$sInput]);
         $actual_column = array_map('reset', $actual_data);
-        $this->assertEquals($expected_data, $actual_column);
+        self::assertEquals($expected_data, $actual_column);
-        $this->assertEquals([
+        self::assertEquals(
+            [
                 'a',
                 'b',
                 "c\r\nd",
-        ], array_map('next', $actual_data));
+            ],
+            array_map('next', $actual_data)
+        );
     }
 
-    public function test_single_column() {
+    public function testSingleColumn() {
         $this->csv->auto(__DIR__ . '/../example_files/single_column.csv');
         $expected = [
             ['SMS' => '0444'],
@@ -103,42 +118,91 @@ class ParseTest extends TestCase {
             ['SMS' => '6606'],
             ['SMS' => '7777'],
         ];
-        $this->assertEquals($expected, $this->csv->data);
+        self::assertEquals($expected, $this->csv->data);
     }
 
-    public function test_Piwik_data() {
+    public function testMatomoData() {
-        if (!function_exists('array_column')) {
+        // Matomo (Piwik) export cannot be read with
-            // function only available in PHP >= 5.5
-            return;
-        }
         $this->csv->use_mb_convert_encoding = true;
         $this->csv->output_encoding = 'UTF-8';
         $this->csv->auto(__DIR__ . '/../example_files/Piwik_API_download.csv');
         $aAction27 = array_column($this->csv->data, 'url (actionDetails 27)');
-        $this->assertEquals([
+        self::assertEquals(
+            [
                 'http://application/_Main/_GraphicMeanSTD_MDI/btnConfBandOptions',
                 '',
                 '',
-        ], $aAction27);
+            ],
+            $aAction27
+        );
 
         $aCity = array_column($this->csv->data, 'city');
-        $this->assertEquals([
+        self::assertEquals(
+            [
                 'São Paulo',
                 'Johannesburg',
                 '',
-        ], $aCity);
+            ],
+            $aCity
+        );
+    }
+
+    /**
+     * Tests if we can handle BOMs in string data, in contrast to loading files.
+     */
+    public function testStringWithLeadingBOM() {
+        $string_with_bom = strtr(
+            file_get_contents(__DIR__ . '/../example_files/UTF-8_with_BOM_and_sep_row.csv'),
+            ["sep=;\n" => '']
+        );
+
+        // Is the BOM still there?
+        self::assertSame(0xEF, ord($string_with_bom));
+
+        $this->csv->output_encoding = 'UTF-8';
+        $this->csv->delimiter = ';';
+        self::assertTrue($this->csv->loadDataString($string_with_bom));
+        self::assertTrue($this->csv->parse($this->csv->file_data));
+
+        // This also tests if ::load_data removed the BOM from the data;
+        // otherwise the 'title' column would have 3 extra bytes.
+        $this->assertEquals([
+            'title',
+            'isbn',
+            'publishedAt',
+        ], array_keys(reset($this->csv->data)));
+
+        $titles = array_column($this->csv->data, 'title');
+        $this->assertEquals([
+            'Красивая кулинария',
+            'The Wine Connoisseurs',
+            'Weißwein',
+        ], $titles);
+    }
+
+    public function testWithMultipleNewlines() {
+        $this->csv->auto(__DIR__ . '/../example_files/multiple_empty_lines.csv');
+        $aElse9 = array_column($this->csv->data, 'else9');
+
+        /** @noinspection SpellCheckingInspection */
+        $this->assertEquals([
+            'Abweichung',
+            'Abweichung',
+            'Abweichung',
+            'Alt',
+            'Fehlt',
+            'Neu',
+            'OK',
+            'Fehlt',
+            'Fehlt',
+            'Fehlt',
+        ], $aElse9);
     }
 
     /**
      * @depends testSepRowAutoDetection
      */
     public function testGetColumnDatatypes() {
-        if (!function_exists('array_column')) {
-            // getDatatypes requires array_column, but that
-            // function is only available in PHP >= 5.5
-            return;
-        }
-
         $this->csv->auto(__DIR__ . '/fixtures/datatype.csv');
         $this->csv->getDatatypes();
         $expected = [
@@ -150,34 +214,42 @@ class ParseTest extends TestCase {
             'price' => 'float',
         ];
 
-        $this->assertEquals($expected, $this->csv->data_types);
+        self::assertEquals($expected, $this->csv->data_types);
     }
 
-
+    /**
-    public function testDataArrayKeysWhenSettingOffsetWithHeading() {
+     * @depends testSepRowAutoDetection
-        $this->csv->offset = 2;
+     */
+    public function testAutoDetectFileHasHeading() {
         $this->csv->auto(__DIR__ . '/fixtures/datatype.csv');
-        $expected = [
+        self::assertTrue($this->csv->autoDetectFileHasHeading());
-            'title',
-            'isbn',
-            'publishedAt',
-            'published',
-            'count',
-            'price'
-        ];
 
-        $this->assertEquals($expected, array_keys($this->csv->data[0]));
-    }
-
-    public function testDataArrayKeysWhenSettingOffsetWithoutHeading() {
         $this->csv->heading = false;
-        $this->csv->offset = 2;
         $this->csv->auto(__DIR__ . '/fixtures/datatype.csv');
-        $expected = range(0, 5, 1);
+        self::assertTrue($this->csv->autoDetectFileHasHeading());
 
-        $this->assertEquals($expected, array_keys($this->csv->data[0]));
+        $this->csv->heading = false;
+        $sInput = "86545235689\r\n34365587654\r\n13469874576";
+        $this->csv->autoDetectionForDataString($sInput);
+        self::assertFalse($this->csv->autoDetectFileHasHeading());
+
+        $this->csv->heading = true;
+        $sInput = "86545235689\r\n34365587654\r\n13469874576";
+        $this->csv->autoDetectionForDataString($sInput);
+        self::assertFalse($this->csv->autoDetectFileHasHeading());
     }
 
+    /**
+     * @doesNotPerformAssertions
+     */
+    public function testVeryLongNonExistingFile() {
+        $this->csv->parse(str_repeat('long_string', PHP_MAXPATHLEN));
+        $this->csv->auto(str_repeat('long_string', PHP_MAXPATHLEN));
+    }
+
+    /**
+     * @return array
+     */
     protected function _get_magazines_data() {
         return [
             [
@@ -198,7 +270,10 @@ class ParseTest extends TestCase {
         ];
     }
 
-    public function autoQuotesDataProvider() {
+    /**
+     * @return array
+     */
+    public function autoQuotesDataProvider(): array {
         return array(
             array('auto-double-enclosure.csv', '"'),
             array('auto-single-enclosure.csv', "'"),
@@ -216,7 +291,44 @@ class ParseTest extends TestCase {
     public function testAutoQuotes($file, $enclosure) {
         $csv = new Csv();
         $csv->auto(__DIR__ . '/fixtures/' . $file, true, null, null, $enclosure);
-        $this->assertArrayHasKey('column1', $csv->data[0], 'Data parsed incorrectly with enclosure ' . $enclosure);
+        self::assertArrayHasKey('column1', $csv->data[0], 'Data parsed incorrectly with enclosure ' . $enclosure);
-        $this->assertEquals('value1', $csv->data[0]['column1'], 'Data parsed incorrectly with enclosure ' . $enclosure);
+        self::assertEquals('value1', $csv->data[0]['column1'], 'Data parsed incorrectly with enclosure ' . $enclosure);
+    }
+
+    /**
+     * Call protected/private method of a class.
+     *
+     * @param object $object     Instantiated object that we will run method on.
+     * @param string $methodName Method name to call
+     * @param array  $parameters Array of parameters to pass into method.
+     *
+     * @return mixed Method return.
+     */
+    private function invokeMethod($object, $methodName, $parameters = []) {
+        $reflection = new ReflectionClass(get_class($object));
+        $method = $reflection->getMethod($methodName);
+        $method->setAccessible(true);
+
+        return $method->invokeArgs($object, $parameters);
+    }
+
+    public function testWaiverFieldSeparator() {
+        self::assertFalse($this->csv->auto(__DIR__ . '/../example_files/waiver_field_separator.csv'));
+        $expected = [
+            'liability waiver',
+            'release of liability form',
+            'release of liability',
+            'sample waiver',
+            'sample waiver form',
+        ];
+        $actual = array_column($this->csv->data, 'keyword');
+        self::assertSame($expected, $actual);
+    }
+
+    public function testEmptyInput() {
+        self::assertFalse($this->csv->parse(''));
+        self::assertFalse($this->csv->parse(null));
+        self::assertFalse($this->csv->parseFile(''));
+        self::assertFalse($this->csv->parseFile(null));
     }
 }

tests/methods/SaveTest.php

@@ -1,11 +1,11 @@
 <?php
+
 namespace ParseCsv\tests\methods;
 
 use ParseCsv\Csv;
 use PHPUnit\Framework\TestCase;
 
-class SaveTest extends TestCase
+class SaveTest extends TestCase {
-{
 
     /** @var Csv */
     private $csv;
@@ -15,7 +15,7 @@ class SaveTest extends TestCase
     /**
      * Setup our test environment objects; will be called before each test.
      */
-    public function setUp() {
+    protected function setUp(): void {
         $this->csv = new Csv();
         $this->csv->auto(__DIR__ . '/../example_files/single_column.csv');
 
@@ -49,6 +49,13 @@ class SaveTest extends TestCase
         $this->saveAndCompare($expected);
     }
 
+    public function testSaveWithNewHeader() {
+        $this->csv->linefeed = "\n";
+        $this->csv->titles = array("NewTitle");
+        $expected = "NewTitle\n0444\n5555\n";
+        $this->saveAndCompare($expected);
+    }
+
     public function testSaveWithoutHeader() {
         $this->csv->linefeed = "\n";
         $this->csv->heading = false;

tests/methods/StreamTest.php

@@ -0,0 +1,71 @@
+<?php
+
+namespace ParseCsv\tests\methods;
+
+use ParseCsv\Csv;
+use PHPUnit\Framework\TestCase;
+
+/**
+ * Writes roughly 1 MB of data. This is useful because of a limit of 8 KB
+ * encountered with stream operations in certain PHP versions.
+ */
+class StreamTest extends TestCase {
+
+    protected function setUp(): void {
+        static $done;
+        if ($done) {
+            // Make sure we register the stream just once - or PHP will scream.
+            return;
+        }
+
+        stream_wrapper_register("example", ExampleStream::class)
+        or die("Failed to register protocol");
+        $done = 1;
+    }
+
+    public function testReadStream() {
+        $csv = new Csv();
+
+        // Write data to our stream:
+        $filename = 'example://tmp';
+        copy(__DIR__ . '/fixtures/datatype.csv', $filename);
+        $many_dots = str_repeat('.', 1000 * 1000) . ";;;;;\n";
+        file_put_contents($filename, $many_dots, FILE_APPEND);
+
+        self::assertSame(';', $csv->auto(file_get_contents($filename)));
+        self::assertCount(4, $csv->data);
+        self::assertCount(6, reset($csv->data));
+    }
+
+    public function testWriteStream() {
+        $csv = new Csv();
+        $csv->linefeed = "\n";
+        $many_dots = str_repeat('.', 1000 * 1000);
+        $csv->data = [
+            [
+                'Name' => 'Rudolf',
+                'Question' => 'Which color is his nose?',
+            ],
+            [
+                'Name' => 'Sponge Bob',
+                'Question' => 'Which shape are his pants?',
+            ],
+            [
+                'Name' => $many_dots,
+                'Question' => 'Can you count one million dots?',
+            ],
+        ];
+
+        // Just export the first column, but with a new name
+        $csv->titles = ['Name' => 'Character'];
+
+        // Write data to our stream:
+        $filename = 'example://data';
+        copy(__DIR__ . '/fixtures/datatype.csv', $filename);
+
+        self::assertSame(true, $csv->save($filename));
+        $expected = "Character\nRudolf\nSponge Bob\n";
+        $expected .= $many_dots . "\n";
+        self::assertSame($expected, file_get_contents($filename));
+    }
+}

tests/methods/UnparseTest.php

@@ -0,0 +1,107 @@
+<?php
+
+namespace ParseCsv\tests\methods;
+
+use ParseCsv\Csv;
+use PHPUnit\Framework\TestCase;
+
+
+class UnparseTest extends Testcase {
+
+    /** @var Csv */
+    private $csv;
+
+    /**
+     * Setup our test environment objects; will be called before each test.
+     */
+    protected function setUp(): void {
+        $this->csv = new Csv();
+        $this->csv->auto(__DIR__ . '/fixtures/auto-double-enclosure.csv');
+    }
+
+    public function testUnparseWithParameters() {
+        $fields = array('a' => 'AA', 'b' => 'BB');
+        $data = [['a' => 'value1', 'b' => 'value2']];
+        $csv_object = new Csv();
+        $csv_string = $csv_object->unparse($data, $fields);
+        $this->assertEquals("AA,BB\rvalue1,value2\r", $csv_string);
+
+        $csv_object = new Csv();
+        $csv_object->linefeed = "\n";
+        $csv_string = $csv_object->unparse([[55, 66]]);
+        $this->assertEquals("55,66\n", $csv_string);
+
+        $csv_object = new Csv();
+        $data2 = [['a' => "multi\rline", 'b' => 'value2']];
+        $csv_object->enclosure = "'";
+        $csv_string = $csv_object->unparse($data2, $fields);
+        $this->assertEquals("AA,BB\r'multi\rline',value2\r", $csv_string);
+    }
+
+    public function testUnparseDefault() {
+        $expected = "column1,column2\rvalue1,value2\rvalue3,value4\r";
+        $this->unparseAndCompare($expected);
+    }
+
+    public function testUnparseDefaultWithoutHeading() {
+        $this->csv->heading = false;
+        $this->csv->auto(__DIR__ . '/fixtures/auto-double-enclosure.csv');
+        $expected = "column1,column2\rvalue1,value2\rvalue3,value4\r";
+        $this->unparseAndCompare($expected);
+    }
+
+    public function testUnparseRenameFields() {
+        $expected = "C1,C2\rvalue1,value2\rvalue3,value4\r";
+        $this->unparseAndCompare($expected, array("C1", "C2"));
+    }
+
+    public function testReorderFields() {
+        $expected = "column2,column1\rvalue2,value1\rvalue4,value3\r";
+        $this->unparseAndCompare($expected, array("column2", "column1"));
+    }
+
+    public function testSubsetFields() {
+        $expected = "column1\rvalue1\rvalue3\r";
+        $this->unparseAndCompare($expected, array("column1"));
+    }
+
+    public function testReorderAndRenameFields() {
+        $fields = array(
+            'column2' => 'C2',
+            'column1' => 'C1',
+        );
+        $expected = "C2,C1\rvalue2,value1\rvalue4,value3\r";
+        $this->unparseAndCompare($expected, $fields);
+    }
+
+    public function testUnparseDefaultFirstRowMissing() {
+        unset($this->csv->data[0]);
+        $expected = "column1,column2\rvalue3,value4\r";
+        $this->unparseAndCompare($expected);
+    }
+
+    public function testUnparseDefaultWithoutData() {
+        unset($this->csv->data[0]);
+        unset($this->csv->data[1]);
+        $expected = "column1,column2\r";
+        $this->unparseAndCompare($expected);
+    }
+
+    public function testObjectCells() {
+        $this->csv->data = [
+            [
+                'column1' => new ObjectThatHasToStringMethod(),
+                'column2' => 'boring',
+            ],
+        ];
+        $this->csv->linefeed = "\n";
+        $expected = "column1,column2\nsome value,boring\n";
+        $this->unparseAndCompare($expected);
+    }
+
+    private function unparseAndCompare($expected, $fields = array()) {
+        $str = $this->csv->unparse($this->csv->data, $fields);
+        $this->assertEquals($expected, $str);
+    }
+
+}

tests/properties/BaseClass.php

@@ -11,7 +11,6 @@ class BaseClass extends TestCase {
      * CSV
      * The parseCSV object
      *
-     * @access protected
      * @var Csv
      */
     protected $csv;
@@ -19,10 +18,8 @@ class BaseClass extends TestCase {
     /**
      * Setup
      * Setup our test environment objects
-     *
-     * @access public
      */
-    public function setUp() {
+    protected function setUp(): void {
         $this->csv = new Csv();
     }
 

tests/properties/ConditionsTest.php

@@ -21,21 +21,93 @@ class ConditionsTest extends BaseClass {
         ]);
     }
 
-    public function testRating() {
+    public function testRatingEquals() {
-        $this->csv->conditions = 'rating < 3';
+        $rating_of_3 = [
-        $this->_compareWithExpected([
+            'The Last Templar',
+            'The Broker (Paperback)',
+            'Without Blood (Paperback)',
+        ];
+        $this->csv->conditions = 'rating = 3';
+        $this->_compareWithExpected($rating_of_3);
+        $this->csv->conditions = 'rating is 3';
+        $this->_compareWithExpected($rating_of_3);
+        $this->csv->conditions = 'rating equals 3';
+        $this->_compareWithExpected($rating_of_3);
+    }
+
+    public function testRatingNotEquals() {
+        $rating_not_4 = [
             'The Killing Kind',
             'The Third Secret',
-        ]);
+            'The Last Templar',
+            'The Traveller',
+            'Prey',
+            'The Broker (Paperback)',
+            'Without Blood (Paperback)',
+            'State of Fear (Paperback)',
+            'Digital Fortress : A Thriller (Mass Market Paperback)',
+            'Angels & Demons (Mass Market Paperback)',
+        ];
+//        $this->csv->conditions = 'rating != 4';
+//        $this->_compareWithExpected($rating_not_4);
+        $this->csv->conditions = 'rating is not 4';
+        $this->_compareWithExpected($rating_not_4);
+//        $this->csv->conditions = 'rating does not contain 4';
+//        $this->_compareWithExpected($rating_not_4);
+    }
 
-        $this->csv->conditions = 'rating >= 5';
+    public function testRatingLessThan() {
-        $this->_compareWithExpected([
+        $less_than_1 = [
+            'The Killing Kind',
+            'The Third Secret',
+        ];
+        $this->csv->conditions = 'rating < 1';
+        $this->_compareWithExpected($less_than_1);
+        $this->csv->conditions = 'rating is less than 1';
+        $this->_compareWithExpected($less_than_1);
+    }
+
+    public function testRatingLessOrEquals() {
+        $less_or_equals_1 = [
+            'The Killing Kind',
+            'The Third Secret',
+        ];
+        $this->csv->conditions = 'rating <= 1';
+        $this->_compareWithExpected($less_or_equals_1);
+        $this->csv->conditions = 'rating is less than or equals 1';
+        $this->_compareWithExpected($less_or_equals_1);
+    }
+
+    public function testRatingGreaterThan() {
+        $greater_4 = [
             'The Traveller',
             'Prey',
             'State of Fear (Paperback)',
             'Digital Fortress : A Thriller (Mass Market Paperback)',
             'Angels & Demons (Mass Market Paperback)',
-        ]);
+        ];
+        $this->csv->conditions = 'rating > 4';
+        $this->_compareWithExpected($greater_4);
+        $this->csv->conditions = 'rating is greater than 4';
+        $this->_compareWithExpected($greater_4);
+    }
+
+    public function testRatingGreaterOrEquals() {
+        $greater_or_equal_4 = [
+            'The Traveller',
+            'Crisis Four',
+            'Prey',
+            'State of Fear (Paperback)',
+            'The Rule of Four (Paperback)',
+            'Deception Point (Paperback)',
+            'Digital Fortress : A Thriller (Mass Market Paperback)',
+            'Angels & Demons (Mass Market Paperback)',
+            'The Da Vinci Code (Hardcover)',
+        ];
+        $this->csv->conditions = 'rating >= 4';
+        $this->_compareWithExpected($greater_or_equal_4);
+        $this->csv->conditions = 'rating is greater than or equals 4';
+        $this->_compareWithExpected($greater_or_equal_4);
     }
 
     public function testTitleContainsSecretOrCode() {

tests/properties/DefaultValuesPropertiesTest.php

@@ -16,152 +16,135 @@ class DefaultValuesPropertiesTest extends TestCase {
      */
     protected $csv = null;
 
-    /**
+    protected function setUp(): void {
-     * Setup
-     * Setup our test environment objects
-     *
-     * @access public
-     */
-    public function setUp() {
-        //setup parse CSV
         $this->csv = new Csv();
     }
 
-    /**
-     * Tear down
-     * Tear down our test environment objects
-     *
-     * @access public
-     */
-    public function tearDown() {
-        $this->csv = null;
-    }
-
     public function test_heading_default() {
-        $this->assertTrue(is_bool($this->csv->heading));
+        self::assertTrue(is_bool($this->csv->heading));
-        $this->assertTrue($this->csv->heading);
+        self::assertTrue($this->csv->heading);
     }
 
     public function test_fields_default() {
-        $this->assertTrue(is_array($this->csv->fields));
+        self::assertTrue(is_array($this->csv->fields));
-        $this->assertCount(0, $this->csv->fields);
+        self::assertCount(0, $this->csv->fields);
     }
 
     public function test_sort_by_default() {
-        $this->assertNull($this->csv->sort_by);
+        self::assertNull($this->csv->sort_by);
     }
 
     public function test_sort_reverse_default() {
-        $this->assertTrue(is_bool($this->csv->sort_reverse));
+        self::assertTrue(is_bool($this->csv->sort_reverse));
-        $this->assertFalse($this->csv->sort_reverse);
+        self::assertFalse($this->csv->sort_reverse);
     }
 
     public function test_sort_type_default() {
-        $this->assertNull($this->csv->sort_type);
+        self::assertEquals('regular', $this->csv->sort_type);
     }
 
     public function test_delimiter_default() {
-        $this->assertTrue(is_string($this->csv->delimiter));
+        self::assertTrue(is_string($this->csv->delimiter));
-        $this->assertEquals(',', $this->csv->delimiter);
+        self::assertEquals(',', $this->csv->delimiter);
     }
 
     public function test_enclosure_default() {
-        $this->assertTrue(is_string($this->csv->enclosure));
+        self::assertTrue(is_string($this->csv->enclosure));
-        $this->assertEquals('"', $this->csv->enclosure);
+        self::assertEquals('"', $this->csv->enclosure);
     }
 
     public function test_enclose_all_default() {
-        $this->assertTrue(is_bool($this->csv->enclose_all));
+        self::assertTrue(is_bool($this->csv->enclose_all));
-        $this->assertFalse($this->csv->enclose_all);
+        self::assertFalse($this->csv->enclose_all);
     }
 
     public function test_conditions_default() {
-        $this->assertNull($this->csv->conditions);
+        self::assertNull($this->csv->conditions);
     }
 
     public function test_offset_default() {
-        $this->assertNull($this->csv->offset);
+        self::assertNull($this->csv->offset);
     }
 
     public function test_limit_default() {
-        $this->assertNull($this->csv->limit);
+        self::assertNull($this->csv->limit);
     }
 
     public function test_auto_depth_default() {
-        $this->assertTrue(is_numeric($this->csv->auto_depth));
+        self::assertTrue(is_numeric($this->csv->auto_depth));
-        $this->assertEquals(15, $this->csv->auto_depth);
+        self::assertEquals(15, $this->csv->auto_depth);
     }
 
     public function test_auto_non_chars_default() {
-        $this->assertTrue(is_string($this->csv->auto_non_chars));
+        self::assertTrue(is_string($this->csv->auto_non_chars));
-        $this->assertEquals("a-zA-Z0-9\n\r", $this->csv->auto_non_chars);
+        self::assertEquals("a-zA-Z0-9\n\r", $this->csv->auto_non_chars);
     }
 
     public function test_auto_preferred_default() {
-        $this->assertTrue(is_string($this->csv->auto_preferred));
+        self::assertTrue(is_string($this->csv->auto_preferred));
-        $this->assertEquals(",;\t.:|", $this->csv->auto_preferred);
+        self::assertEquals(",;\t.:|", $this->csv->auto_preferred);
     }
 
     public function test_convert_encoding_default() {
-        $this->assertTrue(is_bool($this->csv->convert_encoding));
+        self::assertTrue(is_bool($this->csv->convert_encoding));
-        $this->assertFalse($this->csv->convert_encoding);
+        self::assertFalse($this->csv->convert_encoding);
     }
 
     public function test_input_encoding_default() {
-        $this->assertTrue(is_string($this->csv->input_encoding));
+        self::assertTrue(is_string($this->csv->input_encoding));
-        $this->assertEquals('ISO-8859-1', $this->csv->input_encoding);
+        self::assertEquals('ISO-8859-1', $this->csv->input_encoding);
     }
 
     public function test_output_encoding_default() {
-        $this->assertTrue(is_string($this->csv->output_encoding));
+        self::assertTrue(is_string($this->csv->output_encoding));
-        $this->assertEquals('ISO-8859-1', $this->csv->output_encoding);
+        self::assertEquals('ISO-8859-1', $this->csv->output_encoding);
     }
 
     public function test_linefeed_default() {
-        $this->assertTrue(is_string($this->csv->linefeed));
+        self::assertTrue(is_string($this->csv->linefeed));
-        $this->assertEquals("\r", $this->csv->linefeed);
+        self::assertEquals("\r", $this->csv->linefeed);
     }
 
     public function test_output_delimiter_default() {
-        $this->assertTrue(is_string($this->csv->output_delimiter));
+        self::assertTrue(is_string($this->csv->output_delimiter));
-        $this->assertEquals(',', $this->csv->output_delimiter);
+        self::assertEquals(',', $this->csv->output_delimiter);
     }
 
     public function test_output_filename_default() {
-        $this->assertTrue(is_string($this->csv->output_filename));
+        self::assertTrue(is_string($this->csv->output_filename));
-        $this->assertEquals('data.csv', $this->csv->output_filename);
+        self::assertEquals('data.csv', $this->csv->output_filename);
     }
 
     public function test_keep_file_data_default() {
-        $this->assertTrue(is_bool($this->csv->keep_file_data));
+        self::assertTrue(is_bool($this->csv->keep_file_data));
-        $this->assertFalse($this->csv->keep_file_data);
+        self::assertFalse($this->csv->keep_file_data);
     }
 
     public function test_file_default() {
-        $this->assertNull($this->csv->file);
+        self::assertNull($this->csv->file);
     }
 
     public function test_file_data_default() {
-        $this->assertNull($this->csv->file_data);
+        self::assertNull($this->csv->file_data);
     }
 
     public function test_error_default() {
-        $this->assertTrue(is_numeric($this->csv->error));
+        self::assertTrue(is_numeric($this->csv->error));
-        $this->assertEquals(0, $this->csv->error);
+        self::assertEquals(0, $this->csv->error);
     }
 
     public function test_error_info_default() {
-        $this->assertTrue(is_array($this->csv->error_info));
+        self::assertTrue(is_array($this->csv->error_info));
-        $this->assertCount(0, $this->csv->error_info);
+        self::assertCount(0, $this->csv->error_info);
     }
 
     public function test_titles_default() {
-        $this->assertTrue(is_array($this->csv->titles));
+        self::assertTrue(is_array($this->csv->titles));
-        $this->assertCount(0, $this->csv->titles);
+        self::assertCount(0, $this->csv->titles);
     }
 
     public function test_data_default() {
-        $this->assertTrue(is_array($this->csv->data));
+        self::assertTrue(is_array($this->csv->data));
-        $this->assertCount(0, $this->csv->data);
+        self::assertCount(0, $this->csv->data);
     }
 }

tests/properties/OffsetTest.php

@@ -0,0 +1,79 @@
+<?php
+
+namespace ParseCsv\tests\properties;
+
+/**
+ * Tests related to the $offset property
+ */
+class OffsetTest extends BaseClass {
+
+    public function testOffsetOfOne() {
+        $this->csv->offset = 1;
+        $this->csv->auto(__DIR__ . '/../methods/fixtures/datatype.csv');
+        $this->assertCount(3, $this->csv->data);
+
+        if (!function_exists('array_column')) {
+            // function only available in PHP >= 5.5
+            return;
+        }
+        $expected = [
+            'Красивая кулинария',
+            'The Wine Connoisseurs',
+            'Weißwein',
+        ];
+        $actual = array_column($this->csv->data, 'title');
+        $this->assertEquals($expected, $actual);
+    }
+
+    public function numberRangeZeroToFourProvider() {
+        return array_map(function ($number) {
+            return [$number];
+        }, range(0, 4));
+    }
+
+    /**
+     * @dataProvider numberRangeZeroToFourProvider
+     *
+     * @param int $offset
+     */
+    public function testOffsetOfOneNoHeader($offset) {
+        $this->csv->offset = $offset;
+        $this->csv->heading = false;
+        $this->csv->auto(__DIR__ . '/../methods/fixtures/datatype.csv');
+        $this->assertCount(4 - $offset, $this->csv->data);
+    }
+
+    public function testDataArrayKeysWhenSettingOffsetWithHeading() {
+        $this->csv->offset = 2;
+        $this->csv->auto(__DIR__ . '/../methods/fixtures/datatype.csv');
+        $expected = [
+            [
+                'title' => 'The Wine Connoisseurs',
+                'isbn' => '2547-8548-2541',
+                'publishedAt' => '12.12.2011',
+                'published' => 'TRUE',
+                'count' => '',
+                'price' => 20.33,
+            ],
+            [
+                'title' => 'Weißwein',
+                'isbn' => '1313-4545-8875',
+                'publishedAt' => '23.02.2012',
+                'published' => 'false',
+                'count' => 10,
+                'price' => 10,
+            ],
+        ];
+
+        $this->assertEquals($expected, $this->csv->data);
+    }
+
+    public function testDataArrayKeysWhenSettingOffsetWithoutHeading() {
+        $this->csv->heading = false;
+        $this->csv->offset = 2;
+        $this->csv->auto(__DIR__ . '/../methods/fixtures/datatype.csv');
+        $expected = range(0, 5, 1);
+
+        $this->assertEquals($expected, array_keys($this->csv->data[0]));
+    }
+}

tests/properties/PublicPropertiesTest.php

@@ -3,6 +3,7 @@
 namespace ParseCsv\tests\properties;
 
 use ParseCsv\Csv;
+use ParseCsv\enums\SortEnum;
 use PHPUnit\Framework\TestCase;
 
 class PublicPropertiesTest extends TestCase {
@@ -40,7 +41,7 @@ class PublicPropertiesTest extends TestCase {
      *
      * @access public
      */
-    public function setUp() {
+    protected function setUp(): void {
         //setup parse CSV
         $this->csv = new Csv();
 
@@ -57,7 +58,7 @@ class PublicPropertiesTest extends TestCase {
      *
      * @access public
      */
-    public function tearDown() {
+    protected function tearDown(): void {
         $this->csv = null;
         $this->reflection = null;
         $this->properties = null;
@@ -145,4 +146,26 @@ class PublicPropertiesTest extends TestCase {
 
         $this->assertCount($counter, $this->properties);
     }
+
+    public function testDefaultSortTypeIsRegular() {
+        $this->assertEquals(SortEnum::SORT_TYPE_REGULAR, $this->csv->sort_type);
+    }
+
+    public function testSetSortType() {
+        $this->csv->sort_type = 'numeric';
+        $this->assertEquals(SortEnum::SORT_TYPE_NUMERIC, $this->csv->sort_type);
+
+        $this->csv->sort_type = 'string';
+        $this->assertEquals(SortEnum::SORT_TYPE_STRING, $this->csv->sort_type);
+    }
+
+    public function testGetSorting() {
+        $this->csv->sort_type = 'numeric';
+        $sorting = SortEnum::getSorting($this->csv->sort_type);
+        $this->assertEquals(SORT_NUMERIC, $sorting);
+
+        $this->csv->sort_type = 'string';
+        $sorting = SortEnum::getSorting($this->csv->sort_type);
+        $this->assertEquals(SORT_STRING, $sorting);
+    }
 }