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php curl常用函数
php curl常用于:GET,POST,HTTP验证,302重定向,设置cURL的代理。
1、开启PHP的cURL功能
在Windows平台下,或者使用xampp之类的集成服务器的程序,会非常简单,你需要改一改你的php.ini文件的设置,找到php_curl.dll,并取消前面的分号注释就行了。如下所示:
//取消注释,开启cURL功能
extension=php_curl.dll
在Linux下面,那么,你需要重新编译你的PHP了,编辑时,你需要打开编译参数——在configure命令上加上“–with-curl” 参数。
2、使用cURL来GET数据
cURL最简单最常用的采用GET来获取网页内容的PHP函数- function getCURL($url){
- $curl = curl_init();
- curl_setopt($curl, CURLOPT_URL, $url);
- curl_setopt($curl, CURLOPT_HEADER, 0);
- curl_setopt($curl, CURLOPT_TIMEOUT, 3);//超时时间
- curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
- $data = curl_exec($curl);
- curl_close($curl);
- return $data;
- }
复制代码 3、使用cURL来POST数据
当我们需要对cURL请求的页面采用POST的请求方式时,我们使用下面的PHP函数- function _curl_post($url, $vars) {
- $ch = curl_init();
- curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
- curl_setopt($ch, CURLOPT_URL, $url);
- curl_setopt($ch, CURLOPT_POST, 1);
- curl_setopt($ch, CURLOPT_POSTFIELDS, $vars);
- $data = curl_exec($ch);
- curl_close($ch);
- if ($data)
- return $data;
- else
- return false;
- }
复制代码 4、使用cURL,需要HTTP服务器认证
当我们请求地址需要加上身份验证,即HTTP服务器认证的时候,我们就要使用下面的函数了,对于cURL中GET方法使用验证也是采用相同的方式。- function postCurlHTTP($url, $str) {
- $ch = curl_init();
- curl_setopt($ch, CURLOPT_URL, $url);
- curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
- curl_setopt($ch, CURLOPT_POST, 1);
- curl_setopt($ch, CURLOPT_USERPWD, “验证的用户名:密码”);
- curl_setopt($ch, CURLOPT_POSTFIELDS, $str);
- $data = curl_exec($ch);
- $Headers = curl_getinfo($ch);
- if ($Headers['http_code'] == 200) {
- return $data;
- } else {
- return false;
- }
- }
复制代码 5、使用cURL获取302重定向的页面
下面函数$data为重定向后页面的内容,这里我们写一个简单的cURL POST的302重定向后返回重定向页面URL的函数,有时候返回页面的URL更加重要。- function _curl_post_302($url, $vars) {
- $ch = curl_init();
- curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
- curl_setopt($ch, CURLOPT_URL, $url);
- curl_setopt($ch, CURLOPT_POST, 1);
- curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1); // 302 redirect
- curl_setopt($ch, CURLOPT_POSTFIELDS, $vars);
- $data = curl_exec($ch);
- $Headers = curl_getinfo($ch);
- curl_close($ch);
- if ($data&&$Headers)
- return s$Headers["url"];
- else
- return false;
- }
复制代码 6、给cURL加个代理服务器- $ch = curl_init();
- curl_setopt($ch, CURLOPT_URL, ‘http://www.js8.in‘);
- curl_setopt($ch, CURLOPT_HEADER, 1);
- curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
- curl_setopt($ch, CURLOPT_HTTPPROXYTUNNEL, 1);
- curl_setopt($ch, CURLOPT_PROXY, ‘代理服务器地址(www.js8.in):端口’);
- curl_setopt($ch, CURLOPT_PROXYUSERPWD, ‘代理用户:密码’);
- $data = curl_exec();
- curl_close($ch);
复制代码 7、一个cURL简单的类- <?php
- /*
- Sean Huber CURL library
- This library is a basic implementation of CURL capabilities.
- It works in most modern versions of IE and FF.
- ==================================== USAGE ====================================
- It exports the CURL object globally, so set a callback with setCallback($func).
- (Use setCallback(array(’class_name’, ‘func_name’)) to set a callback as a func
- that lies within a different class)
- Then use one of the CURL request methods:
- get($url);
- post($url, $vars); vars is a urlencoded string in query string format.
- Your callback function will then be called with 1 argument, the response text.
- If a callback is not defined, your request will return the response text.
- */
- class CURL {
- var $callback = false;
- function setCallback($func_name) {
- $this->callback = $func_name;
- }
- function doRequest($method, $url, $vars) {
- $ch = curl_init();
- curl_setopt($ch, CURLOPT_URL, $url);
- curl_setopt($ch, CURLOPT_HEADER, 1);
- curl_setopt($ch, CURLOPT_USERAGENT, $_SERVER['HTTP_USER_AGENT']);
- curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
- curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
- curl_setopt($ch, CURLOPT_COOKIEJAR, ‘cookie.txt’);
- curl_setopt($ch, CURLOPT_COOKIEFILE, ‘cookie.txt’);
- if ($method == ‘POST’) {
- curl_setopt($ch, CURLOPT_POST, 1);
- curl_setopt($ch, CURLOPT_POSTFIELDS, $vars);
- }
- $data = curl_exec($ch);
- curl_close($ch);
- if ($data) {
- if ($this->callback)
- {
- $callback = $this->callback;
- $this->callback = false;
- return call_user_func($callback, $data);
- } else {
- return $data;
- }
- } else {
- return curl_error($ch);
- }
- }
- function get($url) {
- return $this->doRequest(‘GET’, $url, ‘NULL’);
- }
- function post($url, $vars) {
- return $this->doRequest(‘POST’, $url, $vars);
- }
- }
- ?>
复制代码 转自:http://blog.phpmake.com/?p=326 |
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