Clean url - return base url

Clean url - return base url

/*******************************************
**	FUNCTION TO GET BASE URL
*******************************************/	
function normalize_url($url) {
	$parts 		= parse_url($url);
	$countParts = count(split('[.]', $parts['host']));

	if (substr($parts['host'], 0, 4) == 'www.') {
		$base_url = str_replace('www.', '', $parts['host']);
	}
	elseif($countParts > 2) {
		$base_url	= '';
		$url_parts	= split('[.]', $parts['host']);
		array_shift($url_parts);
		$counter	= 0;
		$arr_count	= count($url_parts);
		
		foreach($url_parts as $part) {$base_url .= $part.'.';}
		$base_url = substr($base_url, 0, -1);
	}
	else{
		$base_url = $parts['host'];
	}

	return $base_url;    
}