1，抓取無訪問控制文件

<?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);//如果把這行注釋掉的話，就會直接輸出 
     $result=curl_exec($ch); 
     curl_close($ch); 
     ?>

2，使用代理進(jìn)行抓取

為什么要使用代理進(jìn)行抓取呢？以google為例吧，如果去抓google的數(shù)據(jù)，短時間內(nèi)抓的很頻繁的話，你就抓取不到了。google對你的ip地址做限制這個時候，你可以換代理重新抓。

<?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, &#39;user:password&#39;);如果要密碼的話，加上這個
     $result=curl_exec($ch);
     curl_close($ch);
     ?>

3，post數(shù)據(jù)后，抓取數(shù)據(jù)

單獨說一下數(shù)據(jù)提交數(shù)據(jù)，因為用 curl的時候，很多時候會有數(shù)據(jù)交互的，所以比較重要的。

<?php
     $ch= curl_init();
     /*在這里需要注意的是，要提交的數(shù)據(jù)不能是二維數(shù)組或者更高
     *例如array(&#39;name&#39;=>serialize(array(&#39;tank&#39;,&#39;zhang&#39;)),&#39;sex&#39;=>1,&#39;birth&#39;=>&#39;20101010&#39;)
     *例如array(&#39;name&#39;=>array(&#39;tank&#39;,&#39;zhang&#39;),&#39;sex&#39;=>1,&#39;birth&#39;=>&#39;20101010&#39;)這樣會報錯的*/
     $data=array(&#39;name&#39;=>&#39;test&#39;,&#39;sex&#39;=>1,&#39;birth&#39;=>&#39;20101010&#39;);
     curl_setopt($ch, CURLOPT_URL,&#39;http://localhost/mytest/curl/upload.php&#39;);
     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輸出的內(nèi)容Array ( [name] => test [sex] => 1 [birth] => 20101010 )

4，抓取一些有頁面訪問控制的頁面

以前寫過一篇，頁面訪問控制的3種方法有興趣的可以看一下。

如果用上面提到的方法抓的話，會報以下錯誤

You are not authorized to view this page

Youdonot have permission to view this directoryorpage 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.

這個時候，我們就要用CURLOPT_USERPWD來進(jìn)行驗證了

<?php 
     $ch= curl_init(); 
     curl_setopt($ch, CURLOPT_URL,"http://club-china"); 
     /*CURLOPT_USERPWD主要用來破解頁面訪問控制的
     *例如平時我們所以htpasswd產(chǎn)生頁面控制等。*/
     //curl_setopt($ch, CURLOPT_USERPWD, &#39;231144:2091XTAjmd=&#39;); 
     curl_setopt($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，模擬登錄到sina

我們要抓取數(shù)據(jù)，可能是登錄以后的內(nèi)容，這個時候我們就要用到curl的模擬登錄功能了。

<?php  
        
    functionchecklogin($user,$password) 
     { 
     if( emptyempty($user) || emptyempty($password) ) 
     { 
     return0; 
     } 
     $ch= curl_init( ); 
     curl_setopt($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) ) 
     { 
     return0; 
     }else{ 
     return1; 
     } 
     }  
        
     define("USERAGENT",$_SERVER[&#39;HTTP_USER_AGENT&#39;] ); 
     define("COOKIEJAR", tempnam("/tmp","cookie") ); 
     define("TIMEOUT", 500 );  
        
     echochecklogin("zhangying215","xtaj227"); 
     ?> 
  
打開/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