array_change_key_case - all keys in the array changed to lowercase or all uppercase
array_change_key_case ( array $array
[, int $case
= CASE_LOWER ] ) : array
parameter:
array
You need an array of operations.
case
Two constants may be used, where CASE_UPPER
or CASE_LOWER
(default).
example:
<?php $input_array = array("FirSt" => 1, "SecOnd" => 4); print_r(array_change_key_case($input_array, CASE_UPPER)); print_r(array_change_key_case($input_array, CASE_LOWER)); ?>
Output:
Array ( [FIRST] => 1 [SECOND] => 4 ) Array ( [first] => 1 [second] => 4 )