php Telnet関数の実装コード

本の内容： php Telnet機能の例

文章：telnet.php

error_reporting(-1);
//telnet機能类
class Telnet {
 var $sock = NULL;

 function telnet($host,$port) {
 $this->sock = fsockopen($host,$port);
socket_set_timeout($this->sock,2,0);
 }
  function close() {
 if ($this->sock) fclose($this->sock);
 $this->sock = NULL;
 }

 function write($buffer) {
 $buffer = str_replace(chr(255),chr(255).chr(255),$buffer);
 fwrite($this->sock,$buffer);
 }

 function getc() {
 return fgetc($this ->靴下);
 }
関数 read_till($what) {
 $buf = '';
 while (1) {
 $IAC = chr(255);

 $DONT = chr(254);
 $DO = chr(253);

 $WONT = chr(252);
 $WILL = chr(251);

 $theNULL = chr(0);

 $c = $this->getc();

 if ($c === false) return $buf;
 if ($c == $theNULL) {
 continue;
 }

 if ($c == "1") {
 continue;
 }
   if ($c != $IAC) {
 $buf .= $c;

 if ($what == (substr($buf,strlen($buf)-strlen($what)))) {
 return $ buf;
 }
 else {
 continue;
 }
 } // bbs.it-home.org
   $c = $this->getc();

 if ($c == $IAC) {
 $buf .= $c;
 }
 else if (($c == $DO) || ($ c == $DONT)) {
 $opt = $this->getc();
 // echo "".ord($opt)."n";
 fwrite($this->sock, $IAC.$WONT.$opt);
 }
 elseif (($c == $WILL) || ($c == $WONT)) {
 $opt = $this->getc();
 / / echo "我々は ".ord($opt)."n";
 fwrite($this->sock,$IAC.$DONT.$opt);
 }
 else {
 // echo "我々はどこにいるのか? c=".ord($c)."n";
 }
 }
 }
}
/*
使用方法
telnet类的调用
$telnet = new telnet( "192.168.0.1",23);
echo $telnet->read_till("login: ");
$telnet->write("kongxxrn");
echo $telnet->read_till("password: " );
$telnet->write("KONGXXrn");
echo $telnet->read_till(":> ");
$telnet->write("lsrn");
echo $telnet-> ;read_till(":> ");
echo $telnet->close();
*/