array_change_key_case
(PHP 4 >= 4.2.0)
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
<?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.
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