Enable/Disable/View Bitwise Flags

class.BitwiseFlag.php

<?php
/**
* @desc Enable/Disable/View Bitwise Flags
*       (Useful when you need a group of true/false values)
* @author Jeremie J. Jarosh
* 
* NOTE: slightly modifyed from code provided by 'wbcarts at juno dot com'
*       (http://www.php.net/manual/en/language.operators.bitwise.php#108679)
*/
class BitwiseFlag {
	public $flags;
	
	public function __construct( $value=0 ) {
		$this->flags = $value;
	}
	
	public function getFlag( $digit ) {
		$place = 1 << $digit;
		return (($this->flags & $place) == $place);
	}
	
	public function setFlag($digit, $value) {
		$place = 1 << $digit;
		if ( $value == true ) {
			// enable the flag
			$this->flags |= $place;
		} else {
			// disable the flag
			$this->flags &= ~$place;
		}
	}
	
	public function __ToString() {
		return decbin( $this->flags );
	}
}