Applies the user-defined callback
function to each element of the array
. This function will recurse into deeper arrays.
The input array.
Typically, callback
takes on two parameters. The array
parameter's value being the first, and the key/index second.
Note:
If
callback
needs to be working with the actual values of the array, specify the first parameter ofcallback
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
.
Returns TRUE
on success or FALSE
on failure.
<?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.
callback -
Please login to continue.