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';