/**

  * 发送post请求

  * @param string $url 请求地址

  * @param array $post_data post键值对数据

  * @return string

  */

 function send_post($url, $post_data) {

     $postdata = http_build_query($post_data);

     $options = array(

         'http' =>; array(

             'method' =>; 'POST',

             'header' =>; 'Content-type:application/x-www-form-urlencoded',

             'content' =>; $postdata,

             'timeout' =>; 15 * 60 // 超时时间（单位:s）

         )

     );

     $context = stream_context_create($options);

     $result = file_get_contents($url, false, $context);

     return $result;

 }

 /**

  * Socket版本

  * 使用方法：

  * $post_string = "app=socket&version=beta";

  * request_by_socket('blog.snsgou.com', '/restServer.php', $post_string);

  */

 function request_by_socket($remote_server,$remote_path,$post_string,$port = 80,$timeout = 30) {

     $socket = fsockopen($remote_server, $port, $errno, $errstr, $timeout);

     if (!$socket) die("$errstr($errno)");

     fwrite($socket, "POST $remote_path HTTP/1.0");

     fwrite($socket, "User-Agent: Socket Example");

     fwrite($socket, "HOST: $remote_server");

     fwrite($socket, "Content-type: application/x-www-form-urlencoded");

     fwrite($socket, "Content-length: " . （strlen($post_string) + 8） . "");

     fwrite($socket, "Accept:*/*");

     fwrite($socket, "");

     fwrite($socket, "mypost=$post_string");

     fwrite($socket, "");

     $header = "";

     while ($str = trim(fgets($socket, 4096))) {

         $header .= $str;

     }

     $data = "";

     while (!feof($socket)) {

         $data .= fgets($socket, 4096);

     }

     return $data;

 }

 /**

  * Curl版本

  * 使用方法：

  * $post_string = "app=request&version=beta";

  * request_by_curl('http://blog.snsgou.com/restServer.php', $post_string);

  */

 function request_by_curl($remote_server, $post_string) {

     $ch = curl_init();

     curl_setopt($ch, CURLOPT_URL, $remote_server);

     curl_setopt($ch, CURLOPT_POSTFIELDS, 'mypost=' . $post_string);

     curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

     curl_setopt($ch, CURLOPT_USERAGENT, "snsgou.com's CURL Example beta");

     $data = curl_exec($ch);

     curl_close($ch);

     return $data;

 }

 /**

  * 发送HTTP请求

  *

  * @param string $url 请求地址

  * @param string $method 请求方式 GET/POST

  * @param string $refererUrl 请求来源地址

  * @param array $data 发送数据

  * @param string $contentType

  * @param string $timeout

  * @param string $proxy

  * @return boolean

  */

 function send_request($url, $data, $refererUrl = '', $method = 'GET', $contentType = 'application/json', $timeout = 30, $proxy = false) {

     $ch = null;

     if('POST' === strtoupper($method)) {

         $ch = curl_init($url);

         curl_setopt($ch, CURLOPT_POST, 1);

         curl_setopt($ch, CURLOPT_HEADER,0 );

         curl_setopt($ch, CURLOPT_FRESH_CONNECT, 1);

         curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);

         curl_setopt($ch, CURLOPT_FORBID_REUSE, 1);

         curl_setopt($ch, CURLOPT_TIMEOUT, $timeout);

         if ($refererUrl) {

             curl_setopt($ch, CURLOPT_REFERER, $refererUrl);

         }

         if($contentType) {

             curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-Type:'.$contentType));

         }

         if(is_string($data)){

             curl_setopt($ch, CURLOPT_POSTFIELDS, $data);

         } else {

             curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($data));

         }

     } else if('GET' === strtoupper($method)) {

         if(is_string($data)) {

             $real_url = $url. (strpos($url, '?') === false ? '?' : ''). $data;

         } else {

             $real_url = $url. (strpos($url, '?') === false ? '?' : ''). http_build_query($data);

         }

         $ch = curl_init($real_url);

         curl_setopt($ch, CURLOPT_HEADER, 0);

         curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-Type:'.$contentType));

         curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);

         curl_setopt($ch, CURLOPT_TIMEOUT, $timeout);

         if ($refererUrl) {

             curl_setopt($ch, CURLOPT_REFERER, $refererUrl);

         }

     } else {

         $args = func_get_args();

         return false;

     }

     if($proxy) {

         curl_setopt($ch, CURLOPT_PROXY, $proxy);

     }

     $ret = curl_exec($ch);

     $info = curl_getinfo($ch);

     $contents = array(

             'httpInfo' => array(

                     'send' => $data,

                     'url' => $url,

                     'ret' => $ret,

                     'http' => $info,

             )

     );

     curl_close($ch);

     return $ret;

 }