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 $data;}
3、使用cURL来POST数据
当我们需要对cURL请求的页面采用POST的请求方式时，我们使用下面的PHP函数function _curl_post($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 $data;else return false;}立即学习“PHP免费学习笔记（深入）
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4、使用cURL，需要HTTP服务器认证
当我们请求地址需要加上身份验证，即HTTP服务器认证的时候，我们就要使用下面的函数了，对于cURL中GET方法使用验证也是采用相同的方式。
function postCurlHTTP($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 $data;} else {return false;}}
5、使用cURL获取302重定向的页面
下面函数$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;}
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($ch);
7、一个cURL简单的类
php
It works in most modern versions of IE and FF.
curl模块采集任意网页php类curl模块采集任意网页php类下载==================================== USAGE ====================================It exports the CURL object globally, so set a callback with setCallback($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);}}?>转自:http://blog.phpmake.com/?p=326