sendmail.php代码如下：

$name = $_POST['name'];

$myfile = fopen("newfile.txt", "w") or die("Unable to open file!");

$txt = "Bill $name\n";

fwrite($myfile, $txt);

$txt = "Steve Jobs\n";

fwrite($myfile, $txt);

fclose($myfile);

index.php代码如下：

header("Content-type: text/html; charset=utf8");

/**

 * 异步请求处理函数

 * @param  string $url   请求地址

 * @param  array  $param 参数列表

 * @return [type]        [description]

 */

function doRequest($url, $param=array()){     

  $urlinfo = parse_url($url); 

  $host = $urlinfo['host']; 

  $path = $urlinfo['path']; 

  $query = isset($param)? http_build_query($param) : ''; 

  $port = 80; 

  $errno = 0; 

  $errstr = ''; 

  $timeout = 10; 

  $fp = fsockopen($host, $port, $errno, $errstr, $timeout); 

  $out = "POST ".$path." HTTP/1.1\r\n"; 

  $out .= "host:".$host."\r\n"; 

  $out .= "content-length:".strlen($query)."\r\n"; 

  $out .= "content-type:application/x-www-form-urlencoded\r\n"; 

  $out .= "connection:close\r\n\r\n"; 

  $out .= $query; 

  fputs($fp, $out); 

  fclose($fp); 

}

echo time().'
'; 

$url = 'http://demo.study.com/sendmail.php'; 

$param = array( 

  'name'=>'ceshi'

); 

doRequest($url, $param); 

echo time().'
';