Syntax:array array_intersect_uassoc ( array $array1 , array $array2 [, array $ … ], callable $key_compare_func ) Description:Computes the intersection of arrays with additional index check, compares indexes by a callback function <?php $array1 = array("a" => "green", "b" => "brown", "c" => "Yellow", "red"); $array2 = array("a" => "GREEN", "B" => "brown", "yellow", "red"); print_r(array_intersect_uassoc($array1, $array2, "strcasecmp")); ?> OUTPUT Array ( [b] => brown )... Read More »