public function update(){ 
		
	if($this->id && $this->message) { 

		$stmt = $this->conn->prepare(" 
			UPDATE ".$this->messageTable." SET message = ? 
			WHERE id = ?"); 
					
		$stmt->bind_param("si", $this->message, $this->id); 
		
		if($stmt->execute()){					 
			$sqlQuery = " 
				SELECT id, message, user, DATE_FORMAT(created,'%d %M %Y %H:%i:%s') AS post_date 
				FROM ".$this->messageTable." WHERE id = '".$this->id."'"; 
			$stmt2 = $this->conn->prepare($sqlQuery);				 
			$stmt2->execute(); 
			$result = $stmt2->get_result(); 
			$record = $result->fetch_assoc(); 
			echo json_encode($record); 
		}		 
	} 
}