Definition
The array_walk() apply a user-defined function to every element of an array.
Syntax
array_walk(array, callback, userdata)
Parameters
| Parameter | Description |
|---|---|
array |
Required. Specifies the array to work on. |
callback |
Required. Specifies the name of the user-defined callback function. The callback function typically takes on two parameters — the array value being the first, and the key/index second. |
userdata |
Optional. Specifies a parameter to the user-defined callback function. It will be passed as the third parameter to the callback function. |
Example
<?php
function myFunction($value, $key) {
echo "Name: $key - " . "Age: $value" . "<br>";
}
$ages = array("Mark" => 22, "Jeff" => 32, "Mike" => 28);
array_walk($ages, "myFunction");