Online PHP editor | refs for r6BsF

<?php function flatArray($array) { $retval = array(); foreach ($array as $val) { if (is_array($val)) $retval = array_merge($retval, flatArray($val)); else $retval[] = $val; } return $retval; } $array1 = [['#90', '#91'], ['#92', '#93', '#94', '#95', '#96']]; $array2 = ['#82', '#83', '#84', '#85', '#86']; $array3 = [['#90', '#91', ['100', '101']], ['#92', '#93', '#94', '#95', '#96']]; print_r(flatArray($array1)); print_r(flatArray($array2)); print_r(flatArray($array3));