--TEST-- array_intersect_ukey(): Basic test. --FILE-- <?php /* * proto array array_intersect_ukey ( array $array1, array $array2 [, array $ ..., callback $key_compare_func] ) * Function is implemented in ext/standard/array.c */ function key_compare_func($key1, $key2) { if ($key1 == $key2) return 0; else if ($key1 > $key2) return 1; else return -1; } $array1 = array('blue' => 1, 'red' => 2, 'green' => 3, 'purple' => 4); $array2 = array('green' => 5, 'blue' => 6, 'yellow' => 7, 'cyan' => 8); var_dump(array_intersect_ukey($array1, $array2, 'key_compare_func')); ?> --EXPECT-- array(2) { ["blue"]=> int(1) ["green"]=> int(3) }