PHP的curl常用的5个例子

PHP的curl常用的5个例子

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 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.

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

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