array_change_key_case
(PHP 4 >= 4.2.0, PHP 5)
array_change_key_case -- Changes all keys in an array
Description
array
array_change_key_case ( array input [, int case] )
Returns an array with all keys from input lowercased
or uppercased. Numbered indices are left as is.
Parameters
input
The array to work on
case
Either CASE_UPPER or
CASE_LOWER (default)
Return Values
Returns an array with its keys lower or uppercased, or false if
input is not an array.
Errors/Exceptions
Throws E_WARNING if input is
not an array.
Examples
Example 1. array_change_key_case() example
<?php
$input_array = array("FirSt" => 1, "SecOnd" => 4);
print_r(array_change_key_case($input_array, CASE_UPPER));
?>
|
The above example will output: Array
(
[FIRST] => 1
[SECOND] => 4
) |
|
Notes
Note:
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.