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php curl_init函数用法详解说明

Jun 08, 2016 pm 05:23 PM
curl nbsp

在php 中curl_init可以做很多远程采集或模仿用户登录的一些实例,下面小编来给各位同学介绍php中的curl_init使用方法

<script>ec(2);</script>

首先,我们要知道curl_init在php安装是是不可以使用的,我们必须开户它才可以

在C/windows里的php.ini中我打开了extension=php_curl.dll的功能,然后也重启了apapche

你看看PHP的phpinfo()中有没有CURL扩展支持!

把php_curl.dll拷到c:/windows/和c:/windows/system32里面 重启apache

PHP中的CURL函数库(Client URL Library Function)

curl_close — 关闭一个curl会话
curl_copy_handle — 拷贝一个curl连接资源的所有内容和参数
curl_errno — 返回一个包含当前会话错误信息的数字编号
curl_error — 返回一个包含当前会话错误信息的字符串
curl_exec — 执行一个curl会话
curl_getinfo — 获取一个curl连接资源句柄的信息
curl_init — 初始化一个curl会话
curl_multi_add_handle — 向curl批处理会话中添加单独的curl句柄资源
curl_multi_close — 关闭一个批处理句柄资源
curl_multi_exec — 解析一个curl批处理句柄
curl_multi_getcontent — 返回获取的输出的文本流
curl_multi_info_read — 获取当前解析的curl的相关传输信息
curl_multi_init — 初始化一个curl批处理句柄资源
curl_multi_remove_handle — 移除curl批处理句柄资源中的某个句柄资源
curl_multi_select — Get all the sockets associated with the cURL extension, which can then be “selected”
curl_setopt_array — 以数组的形式为一个curl设置会话参数
curl_setopt — 为一个curl设置会话参数
curl_version — 获取curl相关的版本信息

curl_init()函数的作用初始化一个curl会话,curl_init()函数唯一的一个参数是可选的,表示一个url地址。
curl_exec()函数的作用是执行一个curl会话,唯一的参数是curl_init()函数返回的句柄。
curl_close()函数的作用是关闭一个curl会话,唯一的参数是curl_init()函数返回的句柄。

例子一: 基本例子
基本例子

 代码如下 复制代码

??php
// 初始化一个 cURL 对象
$curl = curl_init();

// 设置你需要抓取的URL
curl_setopt($curl, CURLOPT_URL, ‘http://www.cmx8.cn’);

// 设置header
curl_setopt($curl, CURLOPT_HEADER, 1);

// 设置cURL 参数,要求结果保存到字符串中还是输出到屏幕上。
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);

// 运行cURL,请求网页
$data = curl_exec($curl);

// 关闭URL请求
curl_close($curl);

// 显示获得的数据
var_dump($data);

?>

例子二: POST数据

sendSMS.php,其可以接受两个表单域,一个是电话号码,一个是短信内容。
POST数据

 代码如下 复制代码
??php
$phoneNumber = ’13812345678′;
$message = ’This message was generated by curl and php’;
$curlPost = ’pNUMBER=’ . urlencode($phoneNumber) . ’&MESSAGE=’ . urlencode($message) . ’&SUBMIT=Send’;
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, ’http://www.111cn.net/sendSMS.php’);
curl_setopt($ch, CURLOPT_HEADER, 1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $curlPost);
$data = curl_exec();
curl_close($ch);
??

例子三:使用代理服务器
使用代理服务器

 代码如下 复制代码
??php
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, ’http://www.cmx8.cn’);
curl_setopt($ch, CURLOPT_HEADER, 1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_HTTPPROXYTUNNEL, 1);
curl_setopt($ch, CURLOPT_PROXY, ’proxy.111cn.net:1080′);
curl_setopt($ch, CURLOPT_PROXYUSERPWD, ’user:password’);
$data = curl_exec();
curl_close($ch);
??

例子四: 模拟登录

Curl 模拟登录 discuz 程序,适合DZ7.0,将username改成你的用户名,userpass改成你的密码就可以了.
Curl 模拟登录 discuz 程序
 

 代码如下 复制代码

 
!extension_loaded(‘curl’) && die(‘The curl extension is not loaded.’);  
 
$discuz_url = ‘http://www.111cn.net’;//论坛地址  
$login_url = $discuz_url .’/logging.php?action=login’;//登录页地址  
$get_url = $discuz_url .’/my.php?item=threads’; //我的帖子  
 
$post_fields = array();  
//以下两项不需要修改  
$post_fields['loginfield'] = ‘username’;  
$post_fields['loginsubmit'] = ‘true’;  
//用户名和密码,必须填写  
$post_fields['username'] = ‘lxvoip’;  
$post_fields['password'] = ’88888888′;  
//安全提问  
$post_fields['questionid'] = 0;  
$post_fields['answer'] = ”;  
//@todo验证码  
$post_fields['seccodeverify'] = ”;  
 
//获取表单FORMHASH  
$ch = curl_init($login_url);  
curl_setopt($ch, CURLOPT_HEADER, 0);  
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);  
$contents = curl_exec($ch);  
curl_close($ch);  
preg_match(‘//i’, $contents, $matches);  
if(!empty($matches)) {  
   $formhash = $matches[1];  
} else {  
   die(‘Not found the forumhash.’);  
}  
 
//POST数据,获取COOKIE  
$cookie_file = dirname(__FILE__) . ‘/cookie.txt’;  
//$cookie_file = tempnam(‘/tmp’);  
$ch = curl_init($login_url);  
curl_setopt($ch, CURLOPT_HEADER, 0);  
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);  
curl_setopt($ch, CURLOPT_POST, 1);  
curl_setopt($ch, CURLOPT_POSTFIELDS, $post_fields);  
curl_setopt($ch, CURLOPT_COOKIEJAR, $cookie_file);  
curl_exec($ch);  
curl_close($ch);  
 
//带着上面得到的COOKIE获取需要登录后才能查看的页面内容  
$ch = curl_init($get_url);  
curl_setopt($ch, CURLOPT_HEADER, 0);  
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 0);  
curl_setopt($ch, CURLOPT_COOKIEFILE, $cookie_file);  
$contents = curl_exec($ch);  
curl_close($ch);  
 
var_dump($contents);

 

我现在用的是 模拟ie6 的:

 代码如下 复制代码

function crawl_dou_request($url,$timeout=1){//php 模拟get
ob_start();
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_USERAGENT,”MISE 6.0″);
curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT,$timeout);
$file_msg = curl_exec($ch);
curl_close($ch);
return $file_msg;
}

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