array_reverse()
array_reverse() — Return an array with elements in reverse order.
Built-in function of PHP 8.5. The manual lists it as available in PHP 4, PHP 5, PHP 7, PHP 8. This page is the reference card: signature, parameters and return value, plus the changelog and the example the manual provides.
What it does
Takes an input array and returns a new array with the order of the elements reversed.
Signature
array_reverse(array $array, bool $preserve_keys = false): array
Parameters
| Parameter | Type | What it takes |
|---|---|---|
| $array | array | The input array. |
| $preserve_keys | bool | If set to true numeric keys are preserved. Non-numeric keys are not affected by this setting and will always be preserved. |
Return value
Returns the reversed array.
Example
A runnable snippet:
$input = array("php", 4.0, array("green", "red")); $reversed = array_reverse($input); $preserved = array_reverse($input, true); print_r($input); print_r($reversed); print_r($preserved);
Output:
Array ( [0] => php [1] => 4 [2] => Array ( [0] => green [1] => red ) ) Array ( [0] => Array ( [0] => green [1] => red ) [1] => 4 [2] => php ) Array ( [2] => Array ( [0] => green [1] => red ) [1] => 4 [0] => php )
See also
All PHP 8.5 built-in functions
Reference card built from the PHP manual page array_reverse() (PHP documentation, CC BY 3.0). The page is generated from the manual, so the wording of the parameter and return value text follows php.net.