Get a bit, extract a value, or set a bit from a number

THIS FILE SHOULD BE NAMED (ircBot.php)
<?	
    // this is the base class. do NOT 
    // instatiate this. you need to write
    // a class to derive from it and implement
    // a constructor and override all of the
    // on_ functions. An example of a derived
    // runnable bot is listed beneath.
	class IRC_Bot {
  	var $nick; 
  	var $username;		
		var $description;
		var $localhost;
		var $remotehost;
		var $remoteport;
		var $echoincoming;
		var $ircsocket;
		function IRC_Bot() {  
	    set_time_limit(0);
			ob_end_flush();
			echo "\r\n";
		}
		function bot_connect () {
			// connect to IRC server
			$this->ircsocket = fsockopen ($this->remotehost, $this->remoteport) ;
			if (! $this->ircsocket) {
				die ("Error connecting to host.");
			}
			print "Connected to: $this->remotehost:$this->remoteport\n";
			fputs ($this->ircsocket, "USER $this->username $this->localhost $this->remotehost: $this->description\r\n");
			fputs ($this->ircsocket, "NICK $this->nick\r\n");
		}
		function bot_go () {
			// IRC loop
			while (!feof($this->ircsocket)) {
				$incoming = fgets ($this->ircsocket, 1024);
				$incoming = str_replace( "\r", "", $incoming);
				$incoming = str_replace("\n", "", $incoming);
				if ($this->echoincoming) echo $incoming . "\n";
				if (substr($incoming, 0, 1) == ":") {
					$prefix = substr ($incoming, 0, strpos($incoming, ' ')); 
					$incoming = substr ($incoming, strpos($incoming, ' ') + 1);
				} else {
					$prefix = "";
				}
				$command = substr ($incoming, 0, strpos($incoming, ' '));
				$incoming = substr ($incoming, strpos($incoming, ' ') + 1);
				$params = explode (" ", $incoming);
				if ($command == "PING") fputs($this->ircsocket, "PONG\r\n");
				$this->bot_parse ($prefix, $command, $params);
			}		
			fputs($this->ircsocket, "QUIT Unexpected\r\n");
		}
		
		function bot_parse ($prefix, $command, $params) {
			if ($command == "PRIVMSG") {
				$nick = substr ($prefix, strpos($prefix, ":") + 1, strpos($prefix, "!") - 1);
				$ident = substr ($prefix, strpos($prefix, "!"));
				$target = array_shift ($params);
				$params[0] = substr ($params[0], 1);
				if (substr($target, 0, 1) == "#") {
					$this->on_channel_msg ($nick, $ident, $target, $params);
				} else {				
					$this->on_private_msg ($nick, $ident, $params);
				}
			}
			if ($command == "NOTICE") {
				$nick = substr ($prefix, strpos($prefix, ":") + 1, strpos($prefix, "!") - 1);
				$ident = substr ($prefix, strpos($prefix, "!"));
				array_shift ($params);
				$params[0] = substr ($params[0], 1);
				$this->on_notice ($nick, $ident, $params);
			}
		}

		////////////////////////////////////////////////////
		//				IRC FUNCTIONS (call these to perform various irc tasks.)	 //
		////////////////////////////////////////////////////
		function irc_write ($message) {
			fputs ($this->ircsocket, $message . "\r\n");
		}
		
		function irc_join ($channel) {
			$this->irc_write("JOIN $channel");
		}
		function irc_part($channel) {
			$this->irc_write("PART $channel");
		}
		function irc_quit ($reason) {
			$this->irc_write("QUIT :$reason");
		}
		function irc_notice ($user, $message) {
			$this->irc_write("NOTICE :$message");
		}
		
		function irc_msg ($user, $message) {
			$this->irc_write("PRIVMSG $user :$message");
		}
		function irc_action ($user, $message) {
			$this->irc_write ("PRIVMSG $user :" . chr(1) ."ACTION $message");
		}		
		function irc_mode ($channel, $user, $mode) {
			$this->irc_write ("MODE $channel $mode $user");
		}
		function irc_op ($channel, $user) {
			$this->irc_mode ($channel, $user, "+o");
		}
		function irc_deop ($channel, $user) {
			$this->irc_mode ($channel, $user, "-o");
		}

		
		////////////////////////////////////////////////////
		//				IRC EVENTS (override these in your derived class.)				 //
		////////////////////////////////////////////////////
		
		function on_private_msg ($nick, $ident, $params) {
		}
		
		function on_channel_msg ($nick, $ident, $chan, $params) {
		}		
		function on_notice ($nick, $ident, $params) {
		}
		
		
	}
 ?>




PUT ALL THIS IN A DIFFERENT FILE (silverbot.php):
<?
    // this is an example of a runnable 
    // derived bot. run this file at the
    // commandline. DO NOT run it as a
    // web document. it will hang in memory
    // you have been warned.
	define ("BOT_PASSWORD", "fruitloops");
	include ("ircbot.php");

	class Silver_Bot extends IRC_Bot {
		function Silver_Bot ($n = "HBSilver", $r = "irc.dal.net", $p = 6667, $e = true, $d = "Hobbit Bot Silver", $u = "HBSilver", $l = "localhost") {
			$this->IRC_Bot();
			$this->nick = $n;
			$this->username = $u;
			$this->description = $d;
			$this->localhost = $l;
			$this->remotehost = $r;
			$this->remoteport = $p;
			$this->echoincoming = $e;
		}
		
		function on_notice ($nick, $ident, $params) {
			$password = array_shift ($params);
			if ($password == BOT_PASSWORD) {
				$command = array_shift ($params);
				switch ($command) {
				case "JOIN":
					$this->irc_join ($params[0]);
					break;
				case "PART":
					$this->irc_part ($params[0]);
					break;
				case "QUIT":
					$this->irc_quit (join($params, " "));
					break;
				case "MSG":
					$user = array_shift ($params);
					$this->irc_msg($user, join($params, " "));
					break;
				case "OP":
					$this->irc_op($params[0], $params[1]);
					break;
				case "DEOP":
					$this->irc_deop($params[0], $params[1]);
					break;
				case "ACTION":
					$user = array_shift ($params);
					$this->irc_action($user, join($params, " "));
					break;
				}
			} else {
				$this->irc_msg($nick, "You are not my master.");
			}
		}
	}
	// this instantiates a new silverbot
    // and gets it going. 
	$mysilver = new Silver_Bot("HBSilver", "irc.dal.net");
	echo $mysilver->bot_connect();
	echo $mysilver->bot_go();
?>
/*Bit Getting/Setting*/
//Macros//
#define EXTRACT_BITS_RL(the_val, bits_start, bits_len) ((the_val >> (bits_start - 1)) & ((1 << bits_len) - 1))
#define MODIFY_BIT_RL(the_val, bit_num, bit_val) (bit_val == 0 ? (the_val & (~(1 << (bit_num - 1)))) : (the_val | (1 << (bit_num - 1))))
//End Macros//
//Globals//
int iVal = 0, iShift = 0, iBitVal = 0, iMenu = 1;
//End Globals//
//Prototyes//
void ShowVal();
void ShowMenu();
//End Prototypes//
int main()
	{
		while(iMenu < 4) //Better way of avoiding GOTOs
			{
				if(iMenu == 1)
					{
						cout << "Input Test Value (0 to 255): ";
						cin >> iVal;
					}
				if(iMenu == 0)
					{
						cout << "Enter Bit Position To Be Modified (1 to 8): ";
						cin >> iShift;
						cout << "Enter New Bit Value (0 or 1): ";
						cin >> iBitVal;
						iVal = MODIFY_BIT_RL(iVal, iShift, iBitVal); //Modify the number's bits
					}
				if(iMenu == 2)
					{
						ShowVal();
					}
				if(iMenu == 3)
					{
						cout << "Enter Start: ";
						cin >> iShift;
						cout << "Enter Length: ";
						cin >> iBitVal;
						cout << "Extracted Value: " << EXTRACT_BITS_RL(iVal, iShift, iBitVal) << "\n";
					}
				ShowMenu();
			}
	return(0);
	}
void ShowVal()
	{
		cout << "Binary Values (Right To Left) for \"" << iVal << "\"\n";
		for(int I = 1; I < 9; I++)
			{
				cout << I << ": " << EXTRACT_BITS_RL(iVal, I, 1) << "\n"; //Show bit position (Right to Left)
			}
	}
void ShowMenu()
	{
		//Display menu
		cout << "\n->Program Menu:\n0: Modify \"" << iVal << "\"\n1: Choose New Number\n2: Show Values for \"" << iVal << "\"\n3: Extract Value\n4: Quit\nChoose: ";
		cin >> iMenu;
		cout << "\n";
	}