Online PHP editor | refs for 9mGq0

<?php $arr = array('php__01.png','php__02.png','php__03.png','php_2_01.png','php_2_02.png','php_10_01.png','php_10_02.png','php_9_02.png','php_9_01.png','php_9_03.png'); $cb = function($valueA, $valueB) { $vA = explode('_', $valueA); $vB = explode('_', $valueB); $element = 0; do { $x = $vA[$element] - $vB[$element++]; } while ($x <> 0); return $x; }; usort($arr, $cb); var_dump($arr);