shitty irc bot to fire jarvis

ircbot.php

<?php

/**
 *
 */
set_time_limit(0);
ini_set('display_errors', 'on');

class jBot {

    var $_socket,
    $_config = array(),
    $_ex = array(),
    $_fired = 0;

    public function __construct($config) {
        $this->_config = $config;
        $this->_socket = fsockopen($config['server'], $config['port']);
        stream_set_blocking(STDIN, 0);
        $this->login();
        do {
            $this->main();
        }while(true);
    }

    public function __destruct() {
        fwrite(STDOUT,'Disconnected' . PHP_EOL);
        fclose($this->_socket);
    }

    public function login() {
        $this->sendData('USER', $this->_config['nick'] . ' acidavengers.co.uk ' . $this->_config['nick'] . ' :' . $this->_config['name']);
        $this->sendData('NICK', $this->_config['nick']);
    }

    public function main() {
        $data = fgets($this->_socket, 128);
        if (trim($data))
        {
            fwrite(STDOUT, '<- ' . $data . PHP_EOL);
        }
        preg_match('/^(?:[:@]([^\s]+) )?([^\s]+)(?: ((?:[^:\s][^\s]* ?)*))?(?: ?:(.*))?$/', $data, $matches);

        if (!isset($matches[1]))
        {
            return;
        }

        $a = str_replace(array(chr(10), chr(13)), '', $matches[1]);
        $b = str_replace(array(chr(10), chr(13)), '', $matches[2]);
        $c = str_replace(array(chr(10), chr(13)), '', $matches[3]);
        $d = str_replace(array(chr(10), chr(13)), '', $matches[4]);
        if (isset($matches[0]))
        {
            $command = str_replace(array(chr(10), chr(13)), '', $matches[0]);
            fwrite(STDOUT, '[0]>>' . $command . PHP_EOL);
        }

        if (isset($matches[1]))
        {
            $command = str_replace(array(chr(10), chr(13)), '', $matches[1]);
            fwrite(STDOUT, '[1]>>' . $command . PHP_EOL);
        }

        if (isset($matches[2]))
        {
            $command = str_replace(array(chr(10), chr(13)), '', $matches[2]);
            fwrite(STDOUT, '[2]>>' . $command . PHP_EOL);
            switch($command)
            {
                case('PING'):
                    $this->sendData('PONG', ':' . $matches[4]);
                    break;
                case ('ERROR'):
                    exit();
                    break;
                case('PRIVMSG'):
                    if (strcasecmp($d,'how many times has jarvis been fired') == 0)
                    {
                        $user = explode('!~',$matches[1]);
                        if ($c != $this->_config['nick'])
                        {
                            $this->sendData('PRIVMSG ' . $c, ':He has been fired: '. $this->_fired);
                        }
                        else
                        {
                            $this->sendData('PRIVMSG ' . $user[0], ':He has been fired: '. $this->_fired);
                        }
                    }
                    if (strcasecmp($d,'fire jarvis') == 0)
                    {
                        $this->_fired++;
                    }
                    $params = explode(' ',$d);
                    if (strcasecmp($params[0],'join') == 0)
                    {
                        $this->sendData('JOIN '.$params[1]);
                    }
                    break;
            }
        }

        if (isset($matches[3]))
        {
            $command = str_replace(array(chr(10), chr(13)), '', $matches[3]);
            fwrite(STDOUT, '[3]>>' . $command . PHP_EOL);
        }

        if (isset($matches[4]))
        {
            $command = str_replace(array(chr(10), chr(13)), '', $matches[4]);
            fwrite(STDOUT, '[4]>>' . $command . PHP_EOL);
        }
    }

    function sendData($cmd, $msg = null) {
        //displays stuff to the broswer and sends data to the server.
        if ($msg == null) {
            fwrite($this->_socket, $cmd . "\r\n");
            fwrite(STDOUT, '->'.$cmd . PHP_EOL);
        } else {
            fwrite($this->_socket, $cmd . ' ' . $msg . "\r\n");
            fwrite(STDOUT, '->'.$cmd . ' ' . $msg . PHP_EOL);
        }
    }
}

$jbot = new jBot(array(
  'server' => 'irc.freenode.net',
  'port' => 6667,
  'nick' => 'testjbot',
  'name' => 'J Bot',
  'pass' => 'jbot',
));