PHP curl实现抓取302跳转后页面的示例
PHP的CURL正常抓取页面程序如下:
$url = 'http://www.baidu.com'; $ch = curl_init(); curl_setopt($ch, CURLOPT_URL, $url); curl_setopt($ch, CURLOPT_VERBOSE, true); curl_setopt($ch, CURLOPT_HEADER, true); curl_setopt($ch, CURLOPT_NOBODY, true); curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'GET'); curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); curl_setopt($ch, CURLOPT_TIMEOUT, 20); curl_setopt($ch, CURLOPT_AUTOREFERER, true); curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true); $ret = curl_exec($ch); $info = curl_getinfo($ch); curl_close($ch);
如果你抓取到的是302状态,是因为再抓取的过程中,有的跳转需要给下一个链接传递参数,而下一个链接同时也设置了如果没接收到相应的参数是为非法访问。
curl_setopt($curl, CURLOPT_CUSTOMREQUEST, 'GET');
显示就应该正常了。
上面用来抓取功能,几乎应该没问题的。你可以查一下CURLOPT_CUSTOMREQUEST相关资料。
使用一个自定义的请求信息来代替”GET”或”HEAD”作为HTTP请求。这对于执行”DELETE” 或者其他更隐蔽的HTTP请求。有效值如”GET”,”POST”,”CONNECT”等等。也就是说,不要在这里输入整个HTTP请求。例如输入”GET /index.html HTTP/1.0\r\n\r\n”是不正确的。

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