php 通过fsockopen模拟表单post提交

<？PHP            
    $flag = 0;        
    //要post的数据         
$argv = array(        
     \'var1\'=>\'教程\',         
     \'var2\'=>\'码农\');         
//构造要post的字符串         
foreach ($argv as $key=>$value) {         
     if ($flag!=0) {        
             $params .= \"&\";         
             $flag = 1;         
     }         
     $params.= $key.\"=\"; $params.= urlencode($value);         
     $flag = 1;         
     }         
     $length = strlen($params);        
         //创建socket连接         
     $fp = fsockopen(\"127.0.0.1\",80,$errno,$errstr,10) or exit($errstr.\"--->\".$errno);         
     //构造post请求的头         
     $header = \"POST /mobile/try.php HTTP/1.1\";         
     $header .= \"Host:127.0.0.1\";         
     $header .= \"Referer:/mobile/sendpost.php\";         
     $header .= \"Content-Type: application/x-www-form-urlencoded\";         
     $header .= \"Content-Length: \".$length.\"\";         
     $header .= \"Connection: Close\";        
     //添加post的字符串         
     $header .= $params.\"\";         
     //发送post的数据         
     fputs($fp,$header);         
     $inheader = 1;         
     while (!feof($fp)) {        
             $line = fgets($fp,1024); //去除请求包的头只显示页面的返回数据         
             if ($inheader && ($line == \"n\" || $line == \"\")) {        
                 $inheader = 0;         
             }         
             if ($inheader == 0) {         
                 echo $line;         
             }         
     }         
fclose($fp);         
?>