PHP array_reverse() Function – Returns an Array with Elements in Reverse Order

The array_reverse() function in PHP accepts an input array and returns a new array whose elements are in the opposite order.

Syntax

array_reverse(array $array, bool $preserve_keys = false)

Parameters

array : The input array.

preserve_keys : When set to true, numeric keys are preserved; non‑numeric keys are always preserved.

Return value

Returns the reversed array.

Example

<?php
$input = array("php", 4.0, array("green", "red"));
$result = array_reverse($input);
$result_keyed = array_reverse($input, true);
?>

When printed, $result yields:

Array
(
    [0] => Array
        (
            [0] => green
        )
    [1] => 4
    [2] => php
)

And $result_keyed yields:

Array
(
    [2] => Array
        (
            [0] => green
        )
    [1] => 4
    [0] => php
)