Add or remove trailing slash of the current URL

gistfile1.aw

<?php
/**
 * Add or remove trailing slash of the current URL
 */
function correctTrailingSlash($base = "/", $trainlingSlash = false) {
	// Load the URI data
	$redirect = false;
	$requestUri = $_SERVER["REQUEST_URI"];
	$queryString = $_SERVER["QUERY_STRING"];
	$serverName = $_SERVER["SERVER_NAME"];
	$protocol = ( strtolower( substr( $_SERVER["SERVER_PROTOCOL"], 0, 5 ) ) == 'https' ) ? 'https': 'http';
		
	// Parse the url
	$url = parse_url($protocol . "://" . $serverName . $requestUri);
	$requestUriPath = $url["path"];
		
	// Correct base path
	if ( "/" != substr( $base, "-1" ) )
		$base = $base . '/';
		
	// We are on the homepage!
	if ( $base == $requestUriPath )
		return;
			
	// Correct the url if needed
	if ( "/" != substr( $requestUriPath, "-1" ) && true == $trailingSlash ):
		$redirect = true;
		$canonicalUrl = "http://" . $serverName . $requestUriPath . "/";
	elseif ( "/" == substr( $requestUriPath, "-1" ) && false == $trailingSlash ):
		$redirect = true;
		$canonicalUrl = "http://" . $serverName . substr($requestUriPath, 0, -1);
	endif;

	// Add the query string to the new url
	if ( $queryString ) $canonicalUrl .= "?" . $queryString;
	if ( $url["fragment"] ) $canonicalUrl .= "#" . $url["fragment"];
		
	// Redirect if needed
	if ( true == $redirect ):
		header("Location: " . $canonicalUrl);
		exit;
	endif;
}