PHP判断端口是否打开的代码

 

  
  
  

   
   
   
   
   
    1 
   
   
    
   
   
   <?
   
   
   php

   
   
    2 
   
   
    
   
   
   $host
   
   
    
   
   
   =
   
   
    
   
   
   '
   
   
   www.baidu.com
   
   
   '
   
   
   ; 
   
   
   //
   
   
   要ping的地址，也可以是IP
   
   
   

   
   
    3 
   
   
    
   
   
    
   
   
   $port
   
   
    
   
   
   =
   
   
    
   
   
   '
   
   
   80
   
   
   '
   
   
   ; 
   
   
   //
   
   
   要ping的端口
   
   
   

   
   
    4 
   
   
    
   
   
   $num
   
   
    
   
   
   =
   
   
    
   
   
   3
   
   
   ;

   
   
    5 
   
   
    
   
   
   function
   
   
    microtime_float()

   
   
    6 
   
   
    {

   
   
    7 
   
   
    
   
   
   list
   
   
   (
   
   
   $usec
   
   
   ,
   
   
    
   
   
   $sec
   
   
   ) 
   
   
   =
   
   
    
   
   
   explode
   
   
   (
   
   
   "
   
   
    
   
   
   "
   
   
   ,
   
   
    
   
   
   microtime
   
   
   ());

   
   
    8 
   
   
    
   
   
   return
   
   
    ((
   
   
   float
   
   
   )
   
   
   $usec
   
   
    
   
   
   +
   
   
    (
   
   
   float
   
   
   )
   
   
   $sec
   
   
   );

   
   
    9 
   
   
    }

   
   
   10 
   
   
    
   
   
   function
   
   
    ping(
   
   
   $host
   
   
   ,
   
   
   $port
   
   
   )

   
   
   11 
   
   
    {

   
   
   12 
   
   
    
   
   
   $time_start
   
   
    
   
   
   =
   
   
    microtime_float();

   
   
   13 
   
   
    
   
   
   $ip
   
   
    
   
   
   =
   
   
    
   
   
   gethostbyname
   
   
   (
   
   
   $host
   
   
   );

   
   
   14 
   
   
    
   
   
   $fp
   
   
    
   
   
   =
   
   
    @
   
   
   fsockopen
   
   
   (
   
   
   $host
   
   
   ,
   
   
   $port
   
   
   ,&
   
   
   $errno
   
   
   ,&
   
   
   $errstr
   
   
   ,
   
   
   1
   
   
   );

   
   
   15 
   
   
    
   
   
   if
   
   
   (
   
   
   !
   
   
   $fp
   
   
   ) 
   
   
   return
   
   
    
   
   
   '
   
   
   replay time out!
   
   
   '
   
   
   ;

   
   
   16 
   
   
    
   
   
   $get
   
   
    
   
   
   =
   
   
    
   
   
   "
   
   
   GET / HTTP/1.1\r\nHost:
   
   
   "
   
   
   .
   
   
   $host
   
   
   .
   
   
   "
   
   
   \r\nConnection: Close\r\n\r\n
   
   
   "
   
   
   ;

   
   
   17 
   
   
    @
   
   
   fputs
   
   
   (
   
   
   $fp
   
   
   ,
   
   
   $get
   
   
   );

   
   
   18 
   
   
    @
   
   
   fclose
   
   
   (
   
   
   $fp
   
   
   );

   
   
   19 
   
   
    
   
   
   $time_end
   
   
    
   
   
   =
   
   
    microtime_float();

   
   
   20 
   
   
    
   
   
   $time
   
   
    
   
   
   =
   
   
    
   
   
   $time_end
   
   
    
   
   
   -
   
   
    
   
   
   $time_start
   
   
   ;

   
   
   21 
   
   
    
   
   
   $time
   
   
    
   
   
   =
   
   
    
   
   
   ceil
   
   
   (
   
   
   $time
   
   
    
   
   
   *
   
   
    
   
   
   1000
   
   
   );

   
   
   22 
   
   
    
   
   
   return
   
   
    
   
   
   '
   
   
   Reply from 
   
   
   '
   
   
   .
   
   
   $ip
   
   
   .
   
   
   '
   
   
   : time=
   
   
   '
   
   
   .
   
   
   $time
   
   
   .
   
   
   '
   
   
   ms<br />
   
   
   '
   
   
   ;

   
   
   23 
   
   
    }

   
   
   24 
   
   
    
   
   
   echo
   
   
    
   
   
   '
   
   
   Pinging 
   
   
   '
   
   
   .
   
   
   $host
   
   
   .
   
   
   '
   
   
    [
   
   
   '
   
   
   .
   
   
   gethostbyname
   
   
   (
   
   
   $host
   
   
   )
   
   
   .
   
   
   '
   
   
   ] with Port:
   
   
   '
   
   
   .
   
   
   $port
   
   
   .
   
   
   '
   
   
    of data:<br /><br />
   
   
   '
   
   
   .
   
   
   "
   
   
   \r\n
   
   
   "
   
   
   ;

   
   
   25 
   
   
    
   
   
   for
   
   
   (
   
   
   $i
   
   
    
   
   
   =
   
   
    
   
   
   0
   
   
   ;
   
   
   $i
   
   
    
   
   
   <
   
   
    
   
   
   $num
   
   
   ;
   
   
   $i
   
   
   ++
   
   
   )

   
   
   26 
   
   
    { 

   
   
   27 
   
   
    ping(
   
   
   $host
   
   
   ,
   
   
   $port
   
   
   );

   
   
   28 
   
   
    
   
   
   sleep
   
   
   (
   
   
   1
   
   
   );

   
   
   29 
   
   
    
   
   
   ob_flush
   
   
   ();

   
   
   30 
   
   
    
   
   
   flush
   
   
   ();

   
   
   31 
   
   
    }

   
   
   32 
   
   
    
   
   
   ?>
   
   
   

   
   
   33