php使用socket post数据到其它web服务器的方法

function post_request($url, $data, $referer='') {  // Convert the data array into URL Parameters like a=b&foo=bar etc.  $data = http_build_query($data);  // parse the given URL  $url = parse_url($url);  if ($url['scheme'] != 'http') {     die('Error: Only HTTP request are supported !');  }  // extract host and path:  $host = $url['host'];  $path = $url['path'];  // open a socket connection on port 80 - timeout: 30 sec  $fp = fsockopen($host, 80, $errno, $errstr, 30);  if ($fp){    // send the request headers:    fputs($fp, "POST $path HTTP/1.1/r/n");    fputs($fp, "Host: $host/r/n");    if ($referer != '')      fputs($fp, "Referer: $referer/r/n");    fputs($fp, "Content-type: application/x-www-form-urlencoded/r/n");    fputs($fp, "Content-length: ". strlen($data) ."/r/n");    fputs($fp, "Connection: close/r/n/r/n");    fputs($fp, $data);    $result = '';     while(!feof($fp)) {      // receive the results of the request      $result .= fgets($fp, 128);    }  }  else {     return array(      'status' => 'err',       'error' => "$errstr ($errno)"    );  }  // close the socket connection:  fclose($fp);  // split the result header from the content  $result = explode("/r/n/r/n", $result, 2);  $header = isset($result[0]) ? $result[0] : '';  $content = isset($result[1]) ? $result[1] : '';  // return as structured array:  return array(    'status' => 'ok',    'header' => $header,    'content' => $content  );}//使用方法// Submit those variables to the server$post_data = array(  'test' => 'foobar',  'okay' => 'yes',  'number' => 2);// Send a request to example.com $result = post_request('http://www.example.com/', $post_data);if ($result['status'] == 'ok'){  // Print headers   echo $result['header'];   echo '<hr />';  // print the result of the whole request:  echo $result['content'];}else {  echo 'A error occured: ' . $result['error']; }