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: echo '<br />[PHP Telnet] <a href="http://www.jb51.net/php-telnet/errors/php-version.php">Connect failed: Your server's PHP version is too low for PHP Telnet</a><br />'; break; } } } ?>
