PHP Authorization Class

can.php

<?php

/**
 * PHP Authorization Class
 * 
 * Authorization class for PHP.
 * Usage Example:
 * 	$can = new Can();
 * 	$can->user = $user;
 *	
 * 	// DECLARED FUNCTION
 * 	if ( $can->post() ) {
 * 		// AUTHENTICATED USER CAN POST
 * 	} else {
 * 		// UNAUTHENTICATED USER CAN'T POST
 *	}
 * 
 * 	// UNDECLARED FUNCTION
 * 	if ( $can->whistle() ) {
 * 		// ONLY EMPLOYEES, VIPS, AND BETA USERS CAN ACCESS THIS FUNCTION
 * 	} else {
 * 		// EVERYONE ELSE IS DENIED ACCESS
 * 	}
 */

class Can {
	private $data = array();

	public function __call($name, $arguments) {
		return $this->__beta();
	}

	public function __set($name, $value) {
		$this->data[$name] = $value;
	}

	private function __beta(){
		if ( !$this->__authenticated() ){
			return FALSE;
		}

		switch ( $this->data['user']->access_level ) {
			case 'employee':
			case 'vip':
			case 'beta':
				return TRUE;
			default:
				return FALSE;
		}
		
		return FALSE;
	}

	private function __authenticated(){
		if ( empty($this->data['user']) ) {
			return FALSE;
		}
		
		return TRUE;
	}
	
	public function post(){
		if ( $this->__authenticated() ){
			return TRUE;
		}
		
		return FALSE;
	}
}