From f5ff7332a42a36474e775a97f18afe1ff2c47523 Mon Sep 17 00:00:00 2001
From: Fonata <blaeul@gmail.com>
Date: Sat, 17 Mar 2018 12:14:04 +0100
Subject: [PATCH] Set $data field on unparse. This fixes issue #132.

---
 src/Csv.php | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/Csv.php b/src/Csv.php
index a8557af..5c691e7 100644
--- a/src/Csv.php
+++ b/src/Csv.php
@@ -783,6 +783,9 @@ class Csv {
     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)) {
@@ -833,8 +836,6 @@ class Csv {
     }
 
     private function _validate_fields_for_unparse($fields) {
-        // this is needed because sometime titles property is overwritten instead of using fields parameter!
-        $titlesOnParse = !empty($this->data) ? array_keys($this->data[0]) : array();
         if (empty($fields)) {
             $fields = $this->titles;
         }
@@ -843,6 +844,9 @@ class Csv {
             return array();
         }
 
+        // this is needed because sometime titles property is overwritten instead of using fields parameter!
+        $titlesOnParse = !empty($this->data) ? array_keys($this->data[0]) : array();
+
         // both are identical, also in ordering
         if (array_values($fields) === array_values($titlesOnParse)) {
             return array_combine($fields, $fields);