Probleme Data in Date-Bank zu einsetzen

[liebewinter]

das ist das Fehler das ich bekomme mit,

$db->close();
        return $ok;

Fatal error: Uncaught Error: Call to undefined method PDO::close() in /var/www/html/classprove.php:124 Stack trace: #0 /var/www/html/classprove.php(134): ClassProveContakt3->writeCommentToDatabase() #1 /var/www/html/contact.php(84): require('/var/www/html/c...') #2 {main} thrown in /var/www/html/classprove.php on line 124