array_change_key_case
(PHP 4 >= 4.2.0)
array_change_key_case -- Returns an array with all string keys lowercased or uppercasedDescription
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
<?php
$input_array = array("FirSt" => 1, "SecOnd" => 4);
print_r(array_change_key_case($input_array, CASE_UPPER));
?>
The printout of the above program will be:
Array
(
[FIRST] => 1
[SECOND] => 4
)
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.
