模拟post请求(PHP)

 <?php

     //=========================模拟post请求====================================
    // ===========================================================
     /**
      * 模拟post进行url请求
      * @param string $url
      * @param array $post_data
      */
     function request_post($url = '', $post_data = array()) {
         if (empty($url) || empty($post_data)) {
             return false;
         }

         $o = "";
         foreach ( $post_data as $k => $v )
         {
             $o.= "$k=" . urlencode( $v ). "&" ;
         }
         $post_data = substr($o,0,-1);

         $postUrl = $url;
         $curlPost = $post_data;
         $ch = curl_init();//初始化curl
         curl_setopt($ch, CURLOPT_URL,$postUrl);//抓取指定网页
         curl_setopt($ch, CURLOPT_HEADER, 0);//设置header
         curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);//要求结果为字符串且输出到屏幕上
         curl_setopt($ch, CURLOPT_POST, 1);//post提交方式
         curl_setopt($ch, CURLOPT_POSTFIELDS, $curlPost);
         $data = curl_exec($ch);//运行curl
         curl_close($ch);

         return $data;
     }

     public function actionPost(){
         $url = 'http://XXXXXXXXX';
         $post_data['username']       = '2015ceshi';
         $post_data['password']      = '123456';

         //$post_data = array();
         $res = $this->request_post($url, $post_data);
         print_r($res);

     }