(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 recurse
into deeper arrays.
input
The input array.
funcname
Typically, funcname takes on two parameters.
The input parameter'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 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.