array_walk_recursive

Description

Applies the user-defined function funcname to each element of the input array. This function will recur into deeper arrays. Typically, funcname takes on two parameters. The input parameter's value being the first, and the key/index second. If the optional userdata parameter is supplied, it will be passed as the third parameter to the callback funcname.

Returns TRUE on success or FALSE on failure.

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(), and information about the callback type.