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
] )
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.
Array Functions
