PHP的curl經常使用的5個例子

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);//若是把這行註釋掉的話,就會直接輸出 
     $result=curl_exec($ch); 
     curl_close($ch); 
     ?>

2,使用代理進行抓取

爲何要使用代理進行抓取呢?以google爲例吧,若是去抓google的數據,短期內抓的很頻繁的話,你就抓取不到了。google對你的ip地址作限制這個時候,你能夠換代理從新抓。php

<?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');若是要密碼的話,加上這個 
     $result=curl_exec($ch); 
     curl_close($ch); 
     ?>

3,post數據後,抓取數據

單獨說一下數據提交數據,由於用 curl的時候,不少時候會有數據交互的,因此比較重要的。html

 <?php 
     $ch= curl_init(); 
     /*在這裏須要注意的是,要提交的數據不能是二維數組或者更高
     *例如array('name'=>serialize(array('tank','zhang')),'sex'=>1,'birth'=>'20101010')
     *例如array('name'=>array('tank','zhang'),'sex'=>1,'birth'=>'20101010')這樣會報錯的*/ 
     $data=array('name'=>'test','sex'=>1,'birth'=>'20101010'); 
     curl_setopt($ch, CURLOPT_URL,'http://localhost/mytest/curl/upload.php'); 
     curl_setopt($ch, CURLOPT_POST, 1); 
     curl_setopt($ch, CURLOPT_POSTFIELDS,$data); 
     curl_exec($ch); 
     ?>

4,抓取一些有頁面訪問控制的頁面

之前寫過一篇,頁面訪問控制的3種方法有興趣的能夠看一下。
 
若是用上面提到的方法抓的話,會報如下錯誤
 
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,咱們就要用CURLOPT_USERPWD來進行驗證了
 <?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
     *例如平時咱們因此htpasswd產生頁面控制等。*/ 
     //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,模擬登陸到sina

咱們要抓取數據,多是登陸之後的內容,這個時候咱們就要用到curl的模擬登陸功能了。數組

 <?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['HTTP_USER_AGENT'] ); 
     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
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