3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array = array('1', '1a', '2a', '3', '4a'); $array2 = array_map(function($val) { return strpos($val, 'a') ? $val : null; }, $array); var_dump(array_filter($array2));

preferences:
41.85 ms | 402 KiB | 5 Q