tryphp_func_array_change_kc.php:
<!DOCTYPE html> <html> <body> <?php $age=array("Peter"=>"35","Ben"=>"37","Joe"=>"43"); print_r(array_change_key_case($age,CASE_UPPER)); ?> </body> </html>
Array ( [PETER] => 35 [BEN] => 37 [JOE] => 43 )