PHP Manual
Prev |  | Next

# array_change_key_case

(PHP 4 CVS only)

array_change_key_case -- Returns an array with all string keys lowercased or uppercased

## Description

``array array_change_key_case` (array input [, int case])`

array_change_key_case() changes the keys in the `input` array to be all lowercase or uppercase. The change depends on the last optional `case` parameter. You can pass two constants there, `CASE_UPPER` and `CASE_LOWER`. The default is `CASE_LOWER`. The function will leave number indices as is.

Example 1. array_change_key_case() example
    $input_array = array("FirSt" => 1, "SecOnd" => 4);
    print_r(array_change_key_case($input_array, CASE_UPPER);
The printout of the above program will be:
    Array
    (
        [FIRST] => 1
        [SECOND] => 2
    )

Prev | Home | Next
array | Up | array_chunk