PHP array_walk_recursive() Function

Example

Run each array element in a user-defined function:

<?php
function myfunction($value,$key)
{
echo "The key $key has the value $value<br>";
}
$a1=array("a"=>"red","b"=>"green");
$a2=array($a1,"1"=>"blue","2"=>"yellow");
array_walk_recursive($a2,"myfunction");
?>

Try it Yourself »

Definition and Usage

The array_walk_recursive() function runs each array element in a user-defined function. The array's keys and values are parameters in the function. The difference between this function and the array_walk() function is that with this function you can work with deeper arrays (an array inside an array).

Syntax

array_walk_recursive(array, myfunction, parameter...)

Parameter Values

Parameter	Description
array	Required. Specifying an array
myfunction	Required. The name of the user-defined function
parameter,...	Optional. Specifies a parameter to the user-defined function. You can assign one parameter to the function, or as many as you like.

Technical Details

Return Value:	Returns TRUE on success or FALSE on failure
PHP Version:	5+

❮ PHP Array Reference