The **`array_reverse` method** reverses an array and returns the reversed array as a new array.

# 
## Syntax

```
array_reverse(array $array_to_reverse, bool $preserve_keys = false): array
```

## Parameters

- **`array_to_reverse`**: The array to be reversed.

- **`preserve_keys`**: An optional Boolean value. If we set the value of `preserve_keys` as `true`, then numeric keys are preserved for the array values. Non-numeric keys will always be preserved. The default value is `false`.

## Code

<?php 
$arr = array(1 => 1, 3 => 3, 'two' => 2);
print_r(array_reverse($arr))
?>

In the code above, we create an array with the following values.

```
1 => 1,
3 => 3,
'two' => 2
```

We call the `array_reverse` method on the created array. This will reverse the order of the array. When the array is reversed, the non-numeric keys are not changed, whereas the numeric keys are changed. 


To preserve the numeric keys, we can pass `true` for the `preserve_keys` argument.

<?php 
$arr = array(1 => 1, 3 => 3, 'two' => 2);
print_r(array_reverse($arr, true))
?>

In the code above, we create an array with the following values. 

```
1 => 1,
3 => 3,
'two' => 2
```

We call the `array_reverse` method with the `preserve_keys` argument as `true`.

```
array_reverse($arr, true)
```

This will not change the numeric keys of the values. 


What is the array_reverse method in PHP?

The array_reverse method in PHP reverses an array, optionally preserving numeric keys.