Apply a user function recursively to every member of an array array_values array_walk Array Functions PHP Manual array_walk_recursive (PHP 5)array_walk_recursive — Apply a user function recursively to every member of an array Description bool array_walk_recursive ( array &$input , callback $funcname [, mixed $userdata ] ) Applies the user-defined function funcname to each element of the input array. This function will recur into deeper arrays. Parameters input The input array. funcname Typically, funcname takes on two parameters. The input parameter's value being the first, and the key/index second. Note: If funcname needs to be working with the actual values of the array, specify the first parameter of funcname as a reference. Then, any changes made to those elements will be made in the original array itself. userdata If the optional userdata parameter is supplied, it will be passed as the third parameter to the callback funcname . Return Values Returns TRUE on success or FALSE on failure. Examples Example #1 array_walk_recursive() example <?php$sweet = array('a' => 'apple', 'b' => 'banana');$fruits = array('sweet' => $sweet, 'sour' => 'lemon');function test_print($item, $key){ echo "$key holds $item\n";}array_walk_recursive($fruits, 'test_print');?> The above example will output: a holds apple b holds banana sour holds lemon You may notice that the key 'sweet' is never displayed. Any key that holds an array will not be passed to the function. See Also array_walk() information about the callback type array_values array_walk Array Functions PHP Manual
