php telnet连接、传递命令、获取返回值等菜鸟教程

感兴趣的小伙伴，下面一起跟随编程之家 jb51.cc的小编来看看吧。
经测试代码如下：

/**
 * telnet连接、传递命令、获取返回值
 *
 * @param 
 * @author 编程之家 jb51.cc jb51.cc
 **/
error_reporting(-1);
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($this->sock); 
 }
 function read_till($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;
    }
   }
   $c = $this->getc();
   
   if ($c == $IAC) {
   $buf .= $c;
   }
   else if (($c == $DO) || ($c == $DONT)) {
    $opt = $this->getc();
    // echo we wont .ord($opt).\n;
    fwrite($this->sock,$IAC.$WONT.$opt);
   }
   elseif (($c == $WILL) || ($c == $WONT)) {
    $opt = $this->getc();
    // echo we dont .ord($opt).\n;
    fwrite($this->sock,$IAC.$DONT.$opt);
   }
   else {
    // echo where are we? c=.ord($c).\n;
   }
  }
 }
}
/*
$telnet = new telnet(192.168.0.1,23);
echo $telnet->read_till(login: );
$telnet->write(kongxx\r\n);
echo $telnet->read_till(password: );
$telnet->write(KONGXX\r\n);
echo $telnet->read_till(:> );
$telnet->write(ls\r\n);
echo $telnet->read_till(:> );
echo $telnet->close();
*/

/***   代码来自编程之家 jb51.cc（jb51.cc）   ***/