PHP array_reduce() Function

PHP array_reduce() Function


Hello folks! welcome back to a new section of our tutorial on PHP. In this tutorial guide, we are going to be studying about the PHP array_reduce() Function.

The built-in array_reduce() function in PHP applies repeatedly the callback function to the elements of the array, so as to reduce the array to a single value.

Syntax

Following below is the syntax to use this function -

array_reduce ( $array, callback $function [, int $initial] );


Parameter Details

Sr.NoParameter & Description
1

array(Required)

It specifies an array.

2

function(Required)

This a callback function.

3

initial(Optional)

It specifies the initial value to send to the function.


Return Value

This function returns a reduced array.

Example

Try out the below example -

<?php
   function call_back_function($v1,$v2) {
      return $v1 . "-" . $v2;
   }
	
   $input = array("a"=>"banana","b"=>"apple","c"=>"orange");
   
   print_r(array_reduce($input, call_back_function));
   print_r("<br />");
   print_r(array_reduce($input, call_back_function, 10));
?> 

Output

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

-banana-apple-orange
10-banana-apple-orange


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

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