PHP 数组函数 array_uintersect()

<?php
   $array1 = array("a"=>"green", "b"=>"brown", "c"=>"blue", "red");
   $array2 = array("a"=>"GREEN", "B"=>"brown", "yellow", "red");

   print_r(array_uintersect($array1, $array2, "strcasecmp"));
?>