pdo assistance

public function send_order_message(){

            $_dns = 'mysql:host=localhost;dbname='.$this->_APP_HOSTING['mysql_database'];
            $_local_connection =
            new PDO($_dns, $this->_APP_HOSTING['mysql_user'], $this->_APP_HOSTING['mysql_password_dec'],
                array(PDO::MYSQL_ATTR_INIT_COMMAND => "SET NAMES 'utf8'")
            );
            $_local_connection->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
            $takeaway_messages_url=$this->_APP_HOSTING["mysql_prefix"]."_order_notes";

            $statement = $_local_connection->prepare("

                INSERT INTO  $takeaway_messages_url (

                    `order_id`,
                    `message`,
                    `time`

                ) VALUES (

                    :order_id,
                    :message,
                    :time

                )");
            $insert_array=array(

                ':order_id' => $this->_request_holder['params']["order_id"],
                ':message' => $this->_request_holder['params']["message"],
                ':time' => time(),
                //':staff_id' => $user_details["id"],
            );
            $statement->execute($insert_array);

           // return $statement->errorInfo();
        }