PHP Array array_reverse() Function (With Examples)

In this tutorial, we will learn about the PHP array_reverse() function with its usage, syntax, parameters, return value, and examples. By IncludeHelp Last updated : December 31, 2023

PHP array_reverse() function

The array_reverse() function is used to returns an array in reverse order, it accepts an array and returns a new array with values in reverse order.

Syntax

The syntax of the array_reverse() function:

array_reverse(array, [preserve]);

Parameters

The parameters of the array_reverse() function:

array is an array.
preserve is an optional parameter and its default value is false, it is used to define whether we want to preserve the keys or not. If it sets to true – keys will also be reversed.

Return Value

The return type of this method is array, it returns the reversed array.

Sample Input/Output

Input:
$arr1 = array(10, 20, 30, 40, 50);

Output:
Array
(
    [0] => 50
    [1] => 40
    [2] => 30
    [3] => 20
    [4] => 10
)

PHP array_reverse() Function Example 1

<?php
$arr1 = array(10, 20, 30, 40, 50);
$arr2 = array("name" => "Amit", "age" => 21, "gender" => "Male");

//printing array in reverse order
print_r (array_reverse($arr1));
print_r (array_reverse($arr2));
?>

Output

The output of the above example is:

Array
(
    [0] => 50
    [1] => 40
    [2] => 30
    [3] => 20
    [4] => 10
)
Array
(
    [gender] => Male
    [age] => 21
    [name] => Amit
)

PHP array_reverse() Function Example 2

<?php
$arr = array(10, 20, 30, 40, 50);

//printing array in reverse order
print_r (array_reverse($arr));
print_r (array_reverse($arr, true));
?>

Output

The output of the above example is:

Array
(    
    [0] => 50
    [1] => 40
    [2] => 30
    [3] => 20
    [4] => 10
)    
Array
(    
    [4] => 50
    [3] => 40
    [2] => 30
    [1] => 20
    [0] => 10
)

To understand the above examples, you should have the basic knowledge of the following PHP topics:

PHP array_product() Function

PHP array_pad() Function