Smiple Bot

<?php
/*
 * Written By: NotMyOwn
 * Email: admin@unrealcomps.org
 *
 * This is for Enigma Group and is ment soley for learning. This bot is in no way advanced, but it is a good learning ground.
 * Note: \n is basically the same as a human hitting enter and makes it so the command runs, this is ONLY for Linux,for it
 * to work on Windows, you must use \r\n
 */
//Main variables
$host = "unrealcomps.org";
$port = 6667;
$nick = "MyBot";
$chan = "#test";
$readbuffer = "";
 
//Open the socket to the IRC Host
$irc = fsockopen($host, $port, $errno, $errstr, 30);
 
//Checks to see if the connection was made and there were no problems
if ($irc)
{
  /*fputs is how you write data to the server, it is basically how you make the bot type
  Bots don't act exactly like a real person and when start a command you must remember it is typing in 
  the main server window, and not the channel window
  Commands are capitalized and not used like you would with a client, because when you type /nick in a 
  client it turns out as NICK in the main code*/
 
  //Since you aren't using a client that does ths automatically, we must define it all.
  //This sets the nickname of the bot ^see variables above to change the nickname^
  fputs($irc, "NICK " . $nick . "\n");
  //This sets the whois of the bot, since this is a simple bot, it will all just be the nickname repatedly
  fputs($irc, "USER " . $nick . " " . $nick . " " . $nick . " :" . $nick . "\n");
  //This is the command to join the channel, see above to change the channel
  fputs($irc, "JOIN :" . $chan . "\n");
  //This is how you talk on the channel, PRIVMSG is basically like PMing a user on IRC only it is 
  //PMing the whole channel because we are on the main server window, and not the channel
  fputs($irc, "PRIVMSG " . $chan . " :" . $nick . " is now online\n");
 
  //This will keep the bot running because while in this loop you can never read feof (end-of-file)
  while (!feof($irc))
  {
    //fgets is the opisite of fputs, it gets what as already been displayed on the server
    $line =  fgets($irc, 128);
    //This echos out the $line so we can see what the server has said
    echo "" . $line . "\n";
    //This parses $line into an array so we can select certain vlaues from it (for the commands) and using a space as the dilimeter
    //which is where it will make a new value, so like this: $text = "this is a sentance"; $text = exploit(" ", $text); print_r($text); 
    //which will display something like this: array('this', 'is', 'a', 'sentance');
    $line = explode(" ", $line);
    //This will mainly be used to keep the bot from timing out, see below for usage
    $line0 = trim($line[0]);
    //This will in general be the main text a user says
    $command = trim($line[3]);
 
    //Uncomment the below to for debugging and figuring out how long the array is and what $line[#] you should use
    //print_r($line);
 
    //Checks to see if the server has pinged us for a timeout
    if ($line0 == "PING")
    {
      //If it has, says pong to the server, $line[1] is the server name, because the way pong works is: /pong irc.server.net
      fputs($irc, "PONG " . $line[1] . "\n");
    }
 
    //This is how to do a basic command, note: the : is required because if you type something it shows up as :My test on the main code
    //What is inside the "" is what the command will be, so to use this command, you would type "!quit" without quotes into IRC from a client
    elseif ($command == ":!exit")
    {
      //Like I said before, this just basically types things into the channel, this notifys us that the bot has quit
      fputs($irc, "PRIVMSG " . $chan . " :Connection Closed\n");
      ///Closes the connection to the server/host
      fclose($irc);
      //Ends the php code so it doesn't just keep running forever if you ran it from command line
      die();
    } 
  }
 
  //Closes the connection to the server/host
  fclose($irc);
  //Ends the php code so it doesn't just keep running forever if you ran it from command line
  die();
 
}
else
{
  //If there was an error opening the socket, displays the error and the error number
  echo "Error: " . $errstr . " | #(" . $errno . ")<br />\n";
}