PHP – Reverse an Array

In this tutorial, you shall learn how to reverse an array in PHP using array_reverse() function, with syntax and examples.

PHP Reverse Array

To reverse an array in PHP, we can use array_reverse() function.

The PHP array_reverse() function returns a new array with elements of the original array in reverse order.

In this tutorial, we will learn how to use array_reverse() function to reverse the order of elements in given array.

Syntax

The syntax of array_reverse() function is

array_reverse( array, preserve )

where

Parameter	Description
array	[mandatory] The source array for reversing.
preserve	[optional] Boolean value telling if the function should preserve the keys of the indexed array or not. This parameter has no effect on associative arrays.

Function Return Value

array_reverse() returns the a new array with elements of the source array arranged in reverse order. Original array/ Source array remains unchanged.

Examples

1. Reverse an Indexed Array

In this example, we will take an indexed array of items, and reverse the order of elements using array_reverse() function.

PHP Program

<?php
  $array1 = array(5=>"apple", "banana", "mango");
  $result = array_reverse($array1);
  print_r($result);
?>

Output

With default value of preserve parameter being FALSE, the indexes for the items are not preserved in the resulting reverse array.