PHP: Get the full URL of the current page

gistfile1

function current_page($params=NULL, $no_trailing_slash=TRUE) {
 	
 	// http(s)://domain.com
 	$url = @$_SERVER['HTTPS'] == 'on' ? 'https://'. $_SERVER['SERVER_NAME'] : 'http://'.$_SERVER['SERVER_NAME'];
	
	// add the port number, if there is one
	if( @$_SERVER['SERVER_PORT'] != "80"  && @$_SERVER['SERVER_PORT'] != "443" ) $url .=  ':'. @$_SERVER['SERVER_PORT'];
	
	// Append the query string
	$url .= $_SERVER['REQUEST_URI'];
	
	// [optionally] remove the trailing slash if there is one
	if( $no_trailing_slash ) $url = rtrim($url, '/');
	
	// Add any additional parameters that may have been included
	if( $params ) $url .= $params;
	
	return $url;
}