php - array_walk_recursive

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. 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.

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.

Example 285. 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