PHP enables online chat-php Tutorial

Source: Internet
Author: User
Tags php online
PHP implements the online chat function for help PHP & nbsp; implements the online chat function & nbsp; for help & nbsp; eager! Php online chat PHP enables online chat for help
PHP enables online chat for help
PHP is eager to realize the online chat function!

Php online chat


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Comet or websocket
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The principle is to constantly request data refreshing. Js ajax
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Baidu search... Ajax
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Easy! Normally, the form is submitted and displayed below, and then the js is set to automatically refresh once in seconds.
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Comet or websocket

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1. ajax is constantly refreshed. Easy to get started. High server resource consumption
2. comet is an ajax persistent connection. Baidu knows that most of the web chats are now. Strong browser compatibility, difficult to get started
3. websocket is html technology, which is not supported by earlier IE versions. Is the future direction.

The last two types are recommended!
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Websocket is html5 technology, which is not supported by earlier IE versions. Is the future direction.

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