(オンライン待機中) php Telnet の問題のヘルプ

<?php/*** name:薛如飞* qq:6706250* e-mail:xuerufei@163.com* blog:<a href="http://hi.baidu.com/" target="_blank">http://hi.baidu.com/</a>飞云盖天* date:08.08.28**/if (isset($_POST['host']) and isset($_POST['user']))  {    $host= $_POST['host'];    $user= $_POST['user'];    $pass= $_POST['pass'];    $cmd= stripslashes($_POST['cmd']);require_once "phptelnet.php";$telnet = new PHPTelnet();$telnet->show_connect_error=0;$result = $telnet->Connect($host,$user,$pass);switch ($result)   {  case 0:  $telnet->DoCommand($cmd, $result);  echo $result;  $telnet->Disconnect();  break;  case 1:  echo '[PHP Telnet] Connect failed: Unable to open network connection';  break;  case 2:  echo '[PHP Telnet] Connect failed: Unknown host';  break;  case 3:  echo '[PHP Telnet] Connect failed: Login failed';  break;  case 4:  echo '[PHP Telnet] Connect failed: Your PHP version does not support PHP Telnet';  break;   }  }else  {?><meta http-equiv="Content-Type" content="text/html; charset=gb2312" /><form action="index.php" method="post" name="form0" id="form0">   <p>   </p>   <p align="center" >Telnet</p>   <table width="200" border="0" align="center">  <tr>    <td width="81" height="18">host:</td>    <td width="109"><input name="host" type="text" size="16" value="" /></td>  </tr>  <tr>    <td width="81" height="18">user:</td>    <td width="109"><input name="user" type="text" size="16" value="" /></td>  </tr>  <tr>    <td width="81" height="18">pass:</td>    <td width="109"><input name="pass" type="text" size="16" value="" /></td>  </tr>  <tr>    <td width="81" height="18">cmd:</td>    <td width="109">          <textarea rows="6" name="cmd" cols="16"></textarea></td>  </tr>  <tr>    <td> </td>    <td><input type="submit" name="Submit" value="提交" /></td>  </tr>   </table>   <p> </p></form><?php   }?> <?php/*PHPTelnet 1.1by Antone Roundyadapted from code found on the PHP websitepublic domain*/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 5var $sleeptime=125000;var $loginsleeptime=1000000;var $fp=NULL;var $loginprompt; var $conn1;var $conn2; /*0 = success1 = couldn't open network connection2 = unknown host3 = login failed4 = PHP version too low*/function Connect($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,"$user\r");    $this->Sleep();    fputs($this->fp,"$pass\r");    if ($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($this->fp,"$c\r");   $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,1000);   $s=socket_get_status($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="<a href="http://www.geckotribe.com/php-telnet/errors/fsockopen.php" target="_blank">http://www.geckotribe.com/php-telnet/errors/fsockopen.php">Connect</a> failed: Unable to open network connection</a><br />'; break;  case 2: echo '<br />[PHP Telnet] <a href="<a href="http://www.geckotribe.com/php-telnet/errors/unknown-host.php" target="_blank">http://www.geckotribe.com/php-telnet/errors/unknown-host.php">Connect</a> failed: Unknown host</a><br />'; break;  case 3: echo '<br />[PHP Telnet] <a href="<a href="http://www.geckotribe.com/php-telnet/errors/login.php" target="_blank">http://www.geckotribe.com/php-telnet/errors/login.php">Connect</a> failed: Login failed</a><br />'; break;  case 4: echo '<br />[PHP Telnet] <a href="<a href="http://www.geckotribe.com/php-telnet/errors/php-version.php" target="_blank">http://www.geckotribe.com/php-telnet/errors/php-version.php">Connect</a> failed: Your server\'s PHP version is too low for PHP Telnet</a><br />'; break;  }}}?>