array_walk_recursive
(PHP 5)
array_walk_recursive — Apply a user function recursively to every member of an array
Description
Applies the user-defined function funcname to each
element of the input array. This function will recurse
into deeper arrays.
Parameters
-
input -
The input array.
-
funcname -
Typically,
funcnametakes on two parameters. Theinputparameter's value being the first, and the key/index second.Note:
If
funcnameneeds to be working with the actual values of the array, specify the first parameter offuncnameas a reference. Then, any changes made to those elements will be made in the original array itself. -
userdata -
If the optional
userdataparameter is supplied, it will be passed as the third parameter to the callbackfuncname.
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() - Apply a user function to every member of an array
- information about the callback type
0044 203 3971 555 (UK)