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PHP可以写网页爬虫吗 ？原理是什么？

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Release： 2016-06-06 20:46:33
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PHP可以写网页爬虫吗 ？原理是什么？

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PHP可以写网页爬虫吗 ？原理是什么？

>

几乎任何语言都能写爬虫，原理也都一样，http 协议抓网页内容，按照需求程度不同，可能还要抓响应码、Cookies、header然后自行处理。

PHP 有 CURL 库，除稳定性稍差以外，基本可用。

可以 通常是用curl做 不过抓取网页的速度相对java等语言来说有点慢

可以写，至于原理都是基于HTTP协议，解析得到的文本，解析出其中的连接，然后再继续访问这些连接，如此反复

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