php如何实现telnet

php实现telnet的方法：1、创建一个PHP示例文件；2、通过“class PHPTelnet {function Connect($server,$user,$pass) {...}}”方式实现telnet功能即可。

本文操作环境：Windows7系统、PHP7.1版、DELL G3电脑

php怎么实现telnet?

php实现telnet功能示例

代码如下:

<?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,"$user\n"); 
                $this->Sleep(); 
                fputs($this->fp,"$pass\n"); 
                if ($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\n"); 
            $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="https://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="https://www.jb51.net/php-telnet/errors/unknown-host.php">Connect failed: Unknown host</a><br />'; break; 
        case 3: echo '<br />[PHP Telnet] <a href="https://www.jb51.net/php-telnet/errors/login.php">Connect failed: Login failed</a><br />'; break; 
        case 4: echo '<br />[PHP Telnet] <a href="https://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; 
        } 
    } 
} 
?>