new feature: getting total data row count without parsing all data

src/Csv.php

@@ -540,6 +540,41 @@ class Csv {
         return $this->delimiter;
     }
 
+    /**
+     * Get total number of rows in csv without parsing whole data.
+     *
+     * @return bool|int
+     */
+    public function getTotalRowCount(){
+        if (empty($this->file_data)){
+            return false;
+        }
+
+        $this->_detect_and_remove_sep_row_from_data($this->file_data);
+
+        $pattern = sprintf('/("[^%s]*")|[^%s]*/i',$this->enclosure, $this->enclosure);
+        preg_match_all($pattern,$this->file_data, $matches);
+
+        foreach ($matches[0] as $match){
+            if (empty($match) || !preg_match("/{$this->enclosure}/", $match)){
+                continue;
+            }
+
+            $replace = str_replace(["\r", "\n"], '', $match);
+            $this->file_data = str_replace($match, $replace, $this->file_data);
+        }
+
+        $headingRow = $this->heading ? 1 : 0;
+
+        $count = substr_count($this->file_data, "\r")
+            + substr_count($this->file_data, "\n")
+            - substr_count($this->file_data, "\r\n")
+            - $headingRow;
+
+
+        return $count;
+    }
+
     // ==============================================
     // ----- [ Core Functions ] ---------------------
     // ==============================================

tests/methods/ParseTest.php

@@ -198,4 +198,41 @@ class ParseTest extends TestCase
         $this->assertArrayHasKey('column1', $csv->data[0], 'Data parsed incorrectly with enclosure ' . $enclosure);
         $this->assertEquals('value1', $csv->data[0]['column1'], 'Data parsed incorrectly with enclosure ' . $enclosure);
     }
+
+    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);
+        $this->assertEquals($expectedRows, $this->csv->getTotalRowCount());
+    }
+
+    public function testGetTotalRowCountMissingEndingLineBreak(){
+        $this->csv->heading = false;
+        $this->csv->enclosure = '"';
+        $sInput = "86545235689,a\r\n34365587654,b\r\n13469874576,\"c\r\nd\"";
+        $this->csv->load_data($sInput);
+        $this->assertEquals(3, $this->csv->getTotalRowCount());
+    }
 }