Wednesday, October 28, 2020

PHP array_walk() Function

PHP array_walk() Function


Hello dear readers! welcome back to another section of our tutorial on PHP. In this tutorial guide, we are going to be studying about the PHP array_walk() Function.

The array_walk() function applies the user-defined callback function to each element of the array array.

The PHP array_walk() function is not affected by the internal array pointer of array. The array_walk() will walk through the entire array regardless of the pointer position.

Syntax

Following below is the syntax to use this function -

array_walk ( $array, $funcname [, $parameter] );


Parameter Details

Sr.NoParameter & Description
1

array(Required)

It specifies an array.

2

funcname(Required)

The name of the user-made function.

3

parameter(Optional)

It specifies a parameter to the user-made function.


Return Value

This function returns TRUE.

Example

Try out the below example -

<?php
   function call_back_function($value,$key) {
      echo "The key $key has the value $value \n";
   }
   $input = array("a"=>"green", "b"=>"brown", "c"=>"blue", "red");
   
   array_walk($input,"call_back_function");
?> 

Output

When the above code is executed, it will produce the following result -

The key a has the value green
The key b has the value brown
The key c has the value blue
The key 0 has the value red


Alright guys! This is where we are rounding up for this tutorial post. In our next tutorial guide, we are going to be discussing about the array_walk_recursive() Function in PHP.

Feel free to ask your questions where necessary and i will attend to them as soon as possible. If this tutorial was helpful to you, you can use the share button to share this tutorial.

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