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                             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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