通知用户数据库更改? JavaScript/AJAX [英] Notify user on database change? JavaScript/AJAX

问题描述

是的

对于整个JavaScript业务，我真的很陌生，更不用说AJAX了，所以我在想，如果你们能帮我一个难题的话.

I'm really quite new to this whole JavaScript business, not to mention AJAX, so I was thinking if you guys could help me out with a conundrum.

基本上，我想要的是在MySQL表的值发生更改时通知用户.我该怎么办?我应该使用jQuery，还是可以自己拍一些东西?

Basically, what I want is for the user to be notified upon a change in a value of a MySQL table. How should I go about that? Should I use jQuery, or can I slap something together myself?

感谢所有答复.

推荐答案

根据需要通知用户的速度，您可以使用轮询(每X秒发送一次请求以查看是否有新内容)或使用彗星.

Depending on how quickly you need the users to be notified, you could use either polling (sending a request every X seconds to see if there's anything new) or use comet.

无论如何，您将需要服务器端编程语言来查询数据库并提供结果，并且客户端需要一些javascript来发送请求和显示响应.我强烈建议使用jQuery库，因为它简化了很多跨浏览器的不兼容性.

In any case, you'll need a server side programming language to be querying the database and serving the results, and you'll need some javascript on the client-side to be sending requests and displaying responses. I would highly recommend using the jQuery library, since it simplifies a lot of cross-browser incompatibility.

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