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user_id=563286

sorry, there was a little error.
Here the right function:

if(!function_exists("array_change_key_case")){
function array_change_key_case($a,$b){
$result=array();
$keys=array_keys($a);
$q=count($k);
if($b=="CASE_LOWER"){
foreach($keys as $K){
$k=strtolower($K);
$result[$k]=$a[$K];
}
}else{
foreach($keys as $k){
$K=strtoupper($k);
$result[$K]=$a[$k];
}
}
return result;
}
}