php curl常用的5个例子我用php ，curl主要是抓取数据，当然我们可以用其他的方法来抓取，比如fsockopen,file_get_contents等。但是只能抓那些能直接访问的页面，如果要抓取有页面访问控制的页面，或者是登录以后的页面就比较困难了。1，抓取无访问控制文件 <?php $ch = curl_init(); curl_setopt($ch, CURLOPT_URL, "http://localhost/mytest/phpinfo.php"); curl_setopt($ch, CURLOPT_HEADER, false); curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); //如果把这行注释掉的话，就会直接输出 $result=curl_exec($ch); curl_close($ch); ?> 2，使用代理进行抓取为什么要使用代理进行抓取呢？以google为例吧，如果去抓google的数据，短时间内抓的很频繁的话，你就抓取不到了。google对你的ip地址做限制这个时候，你可以换代理重新抓。 <?php $ch = curl_init(); curl_setopt($ch, CURLOPT_URL, "http://blog.51yip.com"); curl_setopt($ch, CURLOPT_HEADER, false); curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); curl_setopt($ch, CURLOPT_HTTPPROXYTUNNEL, TRUE); curl_setopt($ch, CURLOPT_PROXY, 125.21.23.6:8080); //url_setopt($ch, CURLOPT_PROXYUSERPWD, ‘user:password‘);如果要密码的话，加上这个 $result=curl_exec($ch); curl_close($ch); ?> 3，post数据后，抓取数据单独说一下数据提交数据，因为用 curl的时候，很多时候会有数据交互的，所以比较重要的。 <?php $ch = curl_init(); /*在这里需要注意的是，要提交的数据不能是二维数组或者更高 *例如array(‘name‘=>serialize(array(‘tank‘,‘zhang‘)),‘sex‘=>1,‘birth‘=>‘20101010‘) *例如array(‘name‘=>array(‘tank‘,‘zhang‘),‘sex‘=>1,‘birth‘=>‘20101010‘)这样会报错的*/ $data = array(‘name‘ => ‘test‘, ‘sex‘=>1,‘birth‘=>‘20101010‘); curl_setopt($ch, CURLOPT_URL, ‘http://localhost/mytest/curl/upload.php‘); curl_setopt($ch, CURLOPT_POST, 1); curl_setopt($ch, CURLOPT_POSTFIELDS, $data); curl_exec($ch); ?> 在 upload.php文件中，print_r($_POST);利用curl就能抓取出upload.php输出的内容Array ( [name] => test [sex] => 1 [birth] => 20101010 )4，抓取一些有页面访问控制的页面以前写过一篇，页面访问控制的3种方法有兴趣的可以看一下。如果用上面提到的方法抓的话，会报以下错误You are not authorized to view this pageYou do not have permission to view this directory or page using the credentials that you supplied because your Web browser is sending a WWW-Authenticate header field that the Web server is not configured to accept.这个时候，我们就要用CURLOPT_USERPWD来进行验证了 <?php $ch = curl_init(); curl_setopt($ch, CURLOPT_URL, "http://club-china"); /*CURLOPT_USERPWD主要用来破解页面访问控制的 *例如平时我们所以htpasswd产生页面控制等。*/ //curl_setopt($ch, CURLOPT_USERPWD, ‘231144:2091XTAjmd=‘); curl_setopt($ch, CURLOPT_HTTPGET, 1); curl_setopt($ch, CURLOPT_REFERER, "http://club-china"); curl_setopt($ch, CURLOPT_HEADER, 0); $result=curl_exec($ch); curl_close($ch); ?> 5，模拟登录到sina我们要抓取数据，可能是登录以后的内容，这个时候我们就要用到curl的模拟登录功能了。 <?php function checklogin( $user, $password ) { if ( emptyempty( $user ) || emptyempty( $password ) ) { return 0; } $ch = curl_init( ); curl_setopt( $ch, CURLOPT_REFERER, "http://mail.sina.com.cn/index.html" ); curl_setopt( $ch, CURLOPT_HEADER, true ); curl_setopt( $ch, CURLOPT_RETURNTRANSFER, true ); curl_setopt( $ch, CURLOPT_USERAGENT, USERAGENT ); curl_setopt( $ch, CURLOPT_COOKIEJAR, COOKIEJAR ); curl_setopt( $ch, CURLOPT_TIMEOUT, TIMEOUT ); curl_setopt( $ch, CURLOPT_URL, "http://mail.sina.com.cn/cgi-bin/login.cgi" ); curl_setopt( $ch, CURLOPT_POST, true ); curl_setopt( $ch, CURLOPT_POSTFIELDS, "&logintype=uid&u=".urlencode( $user )."&psw=".$password ); $contents = curl_exec( $ch ); curl_close( $ch ); if ( !preg_match( "/Location: (.*)\\/cgi\\/index\\.php\\?check_time=(.*)\n/", $contents, $matches ) ) { return 0; }else{ return 1; } } define( "USERAGENT", $_SERVER[‘HTTP_USER_AGENT‘] ); define( "COOKIEJAR", tempnam( "/tmp", "cookie" ) ); define( "TIMEOUT", 500 ); echo checklogin("zhangying215","xtaj227"); ?> 打开/tmp下面的cookie文件看一下# Netscape HTTP Cookie File# http://curl.haxx.se/rfc/cookie_spec.html# This file was generated by libcurl! Edit at your own risk.mail.sina.com.cn FALSE / FALSE 0 SINAMAIL-WEBFACE-SESSID 65223c4bd8900284ed463d2a3e1ac182#HttpOnly_.sina.com.cn TRUE / FALSE 0 SUE es%3D8d96db0820c6c79922ad57d422f575e8%26ev%3Dv0%26es2%3Dcddfb8400dc5ca95902367ddcd7f57dd.sina.com.cn TRUE / FALSE 0 SUP cv%3D1%26bt%3D1286900433%26et%3D1286986833%26lt%3D1%26uid%3D1445632344%26user%3D%25E5%25BC%25A0%25E6%2598%25A02001%26ag%3D2%26name%3Dzhangying20015%2540sina.com%26nick%3D%25E5%25BC%25A0%25E6%2598%25A02001%26sex%3D1%26ps%3D0%26email%3Dzhangying20015%2540sina.com%26dob%3D1982-07-18#HttpOnly_.sina.com.cn TRUE / FALSE 0 SID BihcallomxMx-QZxzGrOlcSQx%2F0B%2F0cmr.NyQ%2F0B%2FcmGGalmarlmcHrcGlSmrmxmfxal_CBZ%2F_afugCmmGirBYHm0Bc%40fr5ciZiGG5i#HttpOnly_.sina.com.cn TRUE / FALSE 0 SPRIAL bfb4102951fd5892a3fd5b42d442cd26#HttpOnly_.sina.com.cn TRUE / FALSE 0 SINA_USER %D5%C5%D2001原文：http://www.cnblogs.com/M-D-Luffy/p/5377471.html