Change all keys in an array to uppercase in PHP
Description
The following code shows how to change all keys in an array to uppercase.
Example
/*w ww . j av a 2 s .c o m*/
<?php
$age=array("First"=>"3","Second"=>"7","Third"=>"4");
print_r(array_change_key_case($age,CASE_UPPER));
$input_array = array("FirSt" => 1, "SecOnd" => 2);
print_r(array_change_key_case($input_array, CASE_UPPER));
?>
The code above generates the following result.