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<?php $match = preg_replace_callback(array('/\d/', '/a/'), function($matches)use(&$result){ $result[] = $matches[0]; return '_'; }, 'ada2d1', 1); print_r($match); print_r($result);
Output for 5.3.0 - 7.1.0
_da_d1Array ( [0] => 2 [1] => a )
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/X2LcP on line 2
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_FUNCTION in /in/X2LcP on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/X2LcP on line 2
Process exited with code 255.