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array_change_key_case

(PHP 4 >= 4.2.0, PHP 5, PHP 7, PHP 8)

array_change_key_case — Changes the case of all keys in an array

Опис

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

Returns an array with all keys from array lowercased or uppercased. Numbered indices are left as is.

Параметри

array

The array to work on

case

Either CASE_UPPER or CASE_LOWER (default)

Значення, що повертаються

Returns an array with its keys lower or uppercased.

Приклади

Приклад #1 array_change_key_case() example

<?php
$input_array = array("FirSt" => 1, "SecOnd" => 4);
print_r(array_change_key_case($input_array, CASE_UPPER));
?>

Поданий вище приклад виведе:

Array
(
    [FIRST] => 1
    [SECOND] => 4
)

Примітки

Зауваження:

If an array has indices that will be the same once run through this function (e.g. "keY" and "kEY"), the value that is later in the array will override other indices.