class PhoneNumber {
		
	private function clean($phone){
		//$clean_phone = preg_replace("^[a-zA-Z._%-+-()]^",'',$phone);
		//remove all non digit charactures from the phone number.
		$clean_phone = preg_replace("[\D]",'',$phone);
		// Make sure 1 isn't the first number.
		if($clean_phone[0] == 1){$clean_phone = substr($clean_phone,1,10);}
		// See if it's a 9 digit number.
		if(strlen($clean_phone) != 10){echo "Error: Parsing Invalid Phone Number."; exit();}
		// Send back all the plain digits.
		return $clean_phone;
	}
	
	public function formatted($style,$phone){
		switch($style){
			case 0: // (xxx) xxx-xxxx
				return "(".$this->areacode($phone).") ".$this->prefix($phone)."-".$this->last4digits($phone);
				break;
			case 1: // xxx-xxx-xxxx
				return $this->areacode($phone)."-".$this->prefix($phone)."-".$this->last4digits($phone);
				break;
			case 2: // xxx.xxx.xxxx
				return $this->areacode($phone).".".$this->prefix($phone).".".$this->last4digits($phone);
				break;		
			case 3: // xxx xxx-xxxx
				return $this->areacode($phone)." ".$this->prefix($phone)."".$this->last4digits($phone);
				break;								
			default: // xxxxxxxxxx
				return $this->digits($phone);
				break;				
		}
	}
	
	public function areacode($phone){
		return substr($this->clean($phone),0,3);
	}
	
	public function prefix($phone){
		return substr($this->clean($phone),3,3);
	}
	
	public function last4digits($phone){
		return substr($this->clean($phone),6,4);
	}
	
	public function digits($phone){
		return $this->clean($phone);
	}
}