array_walk

Syntax

bool array_walk ( 
	array &$given_array,
	callable $callback
	[, mixed $userdata = NULL]
);

PHP manual

Description

This construct, array_walk, is similar to foreach, as it iterates through each element in the given array. However, unlike foreach, it does not affect the array’s internal pointer and the element’s key/value pair are passed to a callback for processing.

Parameters

given_array

The array to loop through and pass each element’s key/value pair to the callback.

callback

The callable to be called (invoked) for each element within the array. It will take two parameters: (1) the element’s value as the first parameter, and (2) the key/index as the second parameter.

userdata

optional If you want to pass a third parameter to the callback, you use the userdata option.

Return Values

Returns TRUE if it successfully walks through the array; else you will get a FALSE back from it.