htaccess Rewrite Rule加载索引两次

Question

i write simple route for my script . and it works well but my index.php loads under all of pages .

.htaccess file :

RewriteEngine On
RewriteBase /
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php/$1 [QSA,L]
RewriteRule ^(.+)/$ /$1 [R,L]
RewriteCond %{REQUEST_URI} !.(css|woff|woff2|svg|eot|ttf|jpe?g|gif|png|js|ico)$ [NC]

route.php :

$request = $_SERVER['REQUEST_URI'];


switch ($request) {
    case '/' :
        require __DIR__ . '/index.php';
        break;
    case '/item/' :
        require __DIR__ . '/template/item.php';
        break;

}