PHP code used to determine whether a server port is opened

Record it and use it later

 
 

  
  
<? Php
  
  
$ Host = www.google.com; // the IP address to be pinged. It can also be an IP address.
  
  
$ Port = 80; // port to be pinged
  
  
$ Num = 3;
  
  
Function microtime_float ()
  
  
{
  
  
List ($ usec, $ sec) = explode ("", microtime ());
  
  
Return (float) $ usec + (float) $ sec );
  
  
}
  
  
Function ping ($ host, $ port)
  
  
{
  
  
$ Time_start = microtime_float ();
  
  
$ Ip = gethostbyname ($ host );
  
  
$ Fp = @ fsockopen ($ host, $ port, & $ errno, & $ errstr, 1 );
  
  
If (! $ Fp) return replay time out !;
  
  
$ Get = "GET/HTTP/1.1 Host:". $ host. "Connection: Close ";
  
  
@ Fputs ($ fp, $ get );
  
  
@ Fclose ($ fp );
  
  
$ Time_end = microtime_float ();
  
  
$ Time = $ time_end-$ time_start;
  
  
$ Time = ceil ($ time * 1000 );
  
  
Return Reply from. $ ip.: time =. $ time. ms <br/>;
  
  
}
  
  
Echo Pinging. $ host. [. gethostbyname ($ host).] with Port:. $ port. of data: <br/> ."";
  
  
For ($ I = 0; $ I <$ num; $ I ++)
  
  
{
  
  
Ping ($ host, $ port );
  
  
Sleep (1 );
  
  
Ob_flush ();
  
  
Flush ();
  
  
}
  
  
?>
 
 

This article from http://www.cnblogs.com/luoine/archive/2010/12/01/1893156.html