array_diff compares the first array to the other array (s) passed as parameter(s) and return s an array , containing all the elements ... ... <看更多>

<?php. // 情境一$s 陣列缺少$f 中[1, 2, 3]. $f = [1,2,3];. $s = [4,5];. var_export(array_diff($f, $s));. /*. array (. 0 => 1,. 1 => 2,. 2 => 3,. ... <看更多>