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编程 - curl、file_get_contents等PHP获取网页内容函数的问题

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Release： 2016-06-06 20:50:23
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该URL如果直接在浏览器输入访问能正确显示内容，但是用CURL或filegetcontents等函数或组件获取内容时会返回空字符串。 以前用PHP抓取百度词典的内容时会出现这种情况，前几天抓12306的数据时也发生了这种情况，请问他们是怎么识别的，有什么解决的办法吗？谢谢！

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该URL如果直接在浏览器输入访问能正确显示内容，但是用CURL或filegetcontents等函数或组件获取内容时会返回空字符串。 以前用PHP抓取百度词典的内容时会出现这种情况，前几天抓12306的数据时也发生了这种情况，请问他们是怎么识别的，有什么解决的办法吗？谢谢！

1.user_agent 要设置成浏览器的 2.referrer 要设置正确 3.带上应该带上的cookie 4.其它附加东西

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12306 curl php programming
source：php.cn
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