5 function main_array_intersect_ukey() {
6 $array1 = darray
["blue" => 1, "red" => 2, "green" => 3, "purple" => 4];
7 $array2 = darray
["green" => 5, "blue" => 6, "yellow" => 7, "cyan" => 8];
8 var_dump(array_intersect_ukey($array1, $array2, strcasecmp
<>));