--TEST-- array_intersect_key(): Basic Test --FILE-- <?php /* * proto array array_intersect_key(array arr1, array arr2 [, array ...]) * Function is implemented in ext/standard/array.c */ $array1 = array('blue' => 1, 'red' => 2, 'green' => 3, 'purple' => 4); $array2 = array('green' => 5, 'blue' => 6, 'yellow' => 7, 'cyan' => 8); var_dump(array_intersect_key($array1, $array2)); ?> --EXPECT-- array(2) { ["blue"]=> int(1) ["green"]=> int(3) }