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array_reverse

Description

The array_reverse of Array for PHP returns an array with elements in reverse order.

Syntax

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

Parameters

array

The input array.

preserve_keys

If set to true numeric keys are preserved. Non-numeric keys are not affected by this setting and will always be preserved.

Return

Returns the reversed array.

Examples

1 · array · indexed

<?

$array =
[
    0,
    1,
    [
        2,
        3
    ]
];

$return = array_reverse($array);

print_r($return);

Array
(
    [0] => Array
        (
            [0] => 2
            [1] => 3
        )

    [1] => 1
    [2] => 0
)

2 · array · associative

<?

$array =
[
    "a" => 0,
    "b" => 1,
    "c" =>
    [
        "d" => 2,
        "e" => 3
    ]
];

$return = array_reverse($array);

print_r($return);

Array
(
    [c] => Array
        (
            [d] => 2
            [e] => 3
        )

    [b] => 1
    [a] => 0
)

3 · preserve_keys · indexed

<?

$array =
[
    0,
    1,
    [
        2,
        3
    ]
];
$preserve_keys = true;

$return = array_reverse($array, $preserve_keys);

print_r($return);

Array
(
    [2] => Array
        (
            [0] => 2
            [1] => 3
        )

    [1] => 1
    [0] => 0
)

4 · preserve_keys · associative

<?

$array =
[
    "a" => 0,
    "b" => 1,
    "c" =>
    [
        "d" => 2,
        "e" => 3
    ]
];
$preserve_keys = true;

$return = array_reverse($array, $preserve_keys);

print_r($return);

Array
(
    [c] => Array
        (
            [d] => 2
            [e] => 3
        )

    [b] => 1
    [a] => 0
)