Foreach con più dati

[wider]

$email = $_POST['email'];
    $id = $_POST['userid'];
    $username  = $_POST['username'];
    
    $i = 0;
    foreach($id as $key => $value) {
        mysql_query("INSERT INTO ciao (id, email, username) VALUES ('" . $value . "', '" . $mail[$i]  . "', '" . $username[$i] . "')");
        $array[] = array('id' => $value, 'email' => $email[$i], 'username' => $username[$i]);
        $i++;
    } 

...brutta bestia l'ignoranza...