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array_change_key_case

Description

The array_change_key_case of Array for PHP changes the case of all keys in an array.

Syntax

array_change_key_case(
    array $array,
    int $case = CASE_LOWER
): array

Parameters

array

The array to work on

case

Either CASE_UPPER or CASE_LOWER (default)

Return

Returns an array with its keys lower or uppercased.

Examples

1 · array

<?

$array =
[
    "zErO" => 0,
    "oNe" => 1
];

$return = array_change_key_case($array);

print_r($return);

Array
(
    [zero] => 0
    [one] => 1
)

2 · case

<?

$array =
[
    "zErO" => 0,
    "oNe" => 1
];
$case = CASE_UPPER;

$return = array_change_key_case($array, $case);

print_r($return);

Array
(
    [ZERO] => 0
    [ONE] => 1
)