--TEST-- Test array_map() function : usage variations - array having subarrays --FILE-- <?php /* Prototype : array array_map ( callback $callback , array $arr1 [, array $... ] ) * Description: Applies the callback to the elements of the given arrays * Source code: ext/standard/array.c */ /* * Test array_map() by passing array having different subarrays */ echo "*** Testing array_map() : array having subarrays ***\n"; function callback($a) { return $a; } // different subarrays $arr1 = array( array(), array(1, 2), array('a', 'b'), array(1, 2, 'a', 'b'), array(1 => 'a', 'b' => 2) ); var_dump( array_map('callback', $arr1)); echo "Done"; ?> --EXPECTF-- *** Testing array_map() : array having subarrays *** array(5) { [0]=> array(0) { } [1]=> array(2) { [0]=> int(1) [1]=> int(2) } [2]=> array(2) { [0]=> string(1) "a" [1]=> string(1) "b" } [3]=> array(4) { [0]=> int(1) [1]=> int(2) [2]=> string(1) "a" [3]=> string(1) "b" } [4]=> array(2) { [1]=> string(1) "a" ["b"]=> int(2) } } Done