Codice PHP:
$array_a = explode(",",$a);
$array_b = explode(",",$b);
$result = array_diff($array_a, $array_b);
$c = implode(",",$result);
Codice PHP:
$array_a = explode(",",$a);
$array_b = explode(",",$b);
$result = array_diff($array_a, $array_b);
$c = implode(",",$result);