public function setPosition($top, $left, $key) { $sql = "SELECT count(*) FROM `positions` WHERE `id`=:id"; $result = $this->getInstance()->prepare($sql); $result->execute(array(':id' => $key)); $number_of_rows = $result->fetchColumn(); if ($number_of_rows > 0) { return Database::Update(array(':top' => $top, ':left' => $left, ':id' => $key)); } }