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, or IP $ port = '80'; // port $ num = 3 to be pinged; functionmicrotime_float () {list ($ usec, $ sec) = explode (, microti

Record it and use it later

 
 

  
  
 
  
  
$ 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 \ r \ nHost:". $ host. "\ r \ nConnection: Close \ r \ n ";
  
  
@ 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 ';
  
  
}
  
  
Echo 'pinging'. $ host. '['. gethostbyname ($ host). '] with Port:'. $ port. 'of data:  '. "\ R \ n ";
  
  
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