PHP to determine whether the server port is open code

Record, spare

 
 

  
  

  
<?php
  
  

  
$host = ' www.google.com '; To ping the address, can also be IP
  
  

  
$port = ' 80 '; The port to Ping
  
  

  
$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 to ' Replay time out! ';
  
  

  
$get = "Get/http/1.1\r\nhost:" $host. " \r\nconnection:close\r\n\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<br/> ';
  
  

  
}
  
  

  
Echo ' Pinging '. $host. ' ['. gethostbyname ($host). '] With Port: '. $port. ' Data:<br/><br/> '. \ r \ n ";
  
  

  
for ($i = 0; $i < $num; $i + +)
  
  

  
{
  
  

  
Ping ($host, $port);
  
  

  
Sleep (1);
  
  

  
Ob_flush ();
  
  

  
Flush ();
  
  

  
}
  
  

  
?>
 
 

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