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run code in 150+ php & hhvm versions
Bugs & Features
<?php $filter = "id eq '2'"; $a = preg_grep('\d+', $filter); var_dump($a);
based on vVAjj
Output for 5.2.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
Warning: preg_grep() expects parameter 2 to be array, string given in /in/mNFKf on line 4 NULL
Output for 4.3.11 - 5.1.6
Warning: preg_grep(): Second argument to preg_grep() should be an array in /in/mNFKf on line 4 NULL
Output for 4.3.0 - 4.3.10
Warning: Second argument to preg_grep() should be an array in /in/mNFKf on line 4 NULL