tryphp_func_array_change_kc3.php:
<!DOCTYPE html> <html> <body> <?php $pets=array("a"=>"Cat","B"=>"Dog","c"=>"Horse","b"=>"Bird"); print_r(array_change_key_case($pets,CASE_UPPER)); ?> </body> </html>
Array ( [A] => Cat [B] => Bird [C] => Horse )