(PHP 5)
array_walk_recursive — Apply a user function recursively to every member of an array
Applies the user-defined function funcname to each element of the input array. This function will recur into deeper arrays.
The input array.
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.
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.