php實現telnet功能示例

 這篇文章主要介紹了php實現telnet功能示例,需要的朋友可以參考下

代碼如下: <?php class PHPTelnet {     var $show_connect_error=1;       var $use_usleep=0;  // change to 1 for faster execution         // don't change to 1 on Windows servers unless you have PHP 5     var $sleeptime=125000;     var $loginsleeptime=1000000;       var $fp=NULL;     var $loginprompt;       var $conn1;     var $conn2;       /*     0 = success     1 = couldn't open network connection     2 = unknown host     3 = login failed     4 = PHP version too low     */     function Connect($server,$user,$pass) {         $rv=0;         $vers=explode('.',PHP_VERSION);         $needvers=array(4,3,0);         $j=count($vers);         $k=count($needvers);         if ($k<$j) $j=$k;         for ($i=0;$i<$j;$i++) {             if (($vers[$i]+0)>$needvers[$i]) break;             if (($vers[$i]+0)<$needvers[$i]) {                 $this->ConnectError(4);                 return 4;             }         }           $this->Disconnect();           if (strlen($server)) {             if (preg_match('/[^0-9.]/',$server)) {                 $ip=gethostbyname($server);                 if ($ip==$server) {                     $ip='';                     $rv=2;                 }             } else $ip=$server;         } else $ip='127.0.0.1';           if (strlen($ip)) {             if ($this->fp=fsockopen($ip,23)) {                 fputs($this->fp,$this->conn1);                 $this->Sleep();                   fputs($this->fp,$this->conn2);                 $this->Sleep();                 $this->GetResponse($r);                 $r=explode("n",$r);                 $this->loginprompt=$r[count($r)-1];                   fputs($this->fp,"$usern");                 $this->Sleep();                   fputs($this->fp,"$passn");                 if ($this->use_usleep) usleep($this->loginsleeptime);                 else sleep(1);                 $this->GetResponse($r);                 $r=explode("n",$r);                 if (($r[count($r)-1]=='')||($this->loginprompt==$r[count($r)-1])) {                     $rv=3;                     $this->Disconnect();                 }             } else $rv=1;         }           if ($rv) $this->ConnectError($rv);         return $rv;     }       function Disconnect($exit=1) {         if ($this->fp) {             if ($exit) $this->DoCommand('exit',$junk);             fclose($this->fp);             $this->fp=NULL;         }     }       function DoCommand($c,&$r) {         if ($this->fp) {             fputs($this->fp,"$cn");             $this->Sleep();             $this->GetResponse($r);             $r=preg_replace("/^.*?n(.*)n[^n]*$/","$1",$r);         }         return $this->fp?1:0;     }       function GetResponse(&$r) {         $r='';         do {              $r.=fread($this->fp, 1024);             $s=socket_get_status($this->fp);         } while ($s['unread_bytes']);     }       function Sleep() {         if ($this->use_usleep) usleep($this->sleeptime);         else sleep(1);     }       function PHPTelnet() {         $this->conn1=chr(0xFF).chr(0xFB).chr(0x1F).chr(0xFF).chr(0xFB).             chr(0x20).chr(0xFF).chr(0xFB).chr(0x18).chr(0xFF).chr(0xFB).             chr(0x27).chr(0xFF).chr(0xFD).chr(0x01).chr(0xFF).chr(0xFB).             chr(0x03).chr(0xFF).chr(0xFD).chr(0x03).chr(0xFF).chr(0xFC).             chr(0x23).chr(0xFF).chr(0xFC).chr(0x24).chr(0xFF).chr(0xFA).             chr(0x1F).chr(0x00).chr(0x50).chr(0x00).chr(0x18).chr(0xFF).             chr(0xF0).chr(0xFF).chr(0xFA).chr(0x20).chr(0x00).chr(0x33).             chr(0x38).chr(0x34).chr(0x30).chr(0x30).chr(0x2C).chr(0x33).             chr(0x38).chr(0x34).chr(0x30).chr(0x30).chr(0xFF).chr(0xF0).             chr(0xFF).chr(0xFA).chr(0x27).chr(0x00).chr(0xFF).chr(0xF0).             chr(0xFF).chr(0xFA).chr(0x18).chr(0x00).chr(0x58).chr(0x54).             chr(0x45).chr(0x52).chr(0x4D).chr(0xFF).chr(0xF0);         $this->conn2=chr(0xFF).chr(0xFC).chr(0x01).chr(0xFF).chr(0xFC).             chr(0x22).chr(0xFF).chr(0xFE).chr(0x05).chr(0xFF).chr(0xFC).chr(0x21);     }       function ConnectError($num) {         if ($this->show_connect_error) switch ($num) {         case 1: echo '<br />[PHP Telnet] <a href="http://www.jb51.net/php-telnet/errors/fsockopen.php">Connect failed: Unable to open network connection</a><br />'; break;         case 2: echo '<br />[PHP Telnet] <a href="http://www.jb51.net/php-telnet/errors/unknown-host.php">Connect failed: Unknown host</a><br />'; break;         case 3: echo '<br />[PHP Telnet] <a href="http://www.jb51.net/php-telnet/errors/login.php">Connect failed: Login failed</a><br />'; break;         case 4: