check for sites where there is no subdirectory

doc/Extensions/Sub-Directory.md

@@ -4,10 +4,8 @@ container of your choosing. If using a virtual host, place the directives in the
 `/etc/apache2/sites-available/default`.
 
 ```apache
-#This directive is never put inside a virtual host
-AllowEncodedSlashes On
-
 #These directives can be inside a virtual host or in the base server configuration
+AllowEncodedSlashes On
 Alias /librenms /opt/librenms/html
 
 <Directory "/opt/librenms/html">

html/includes/vars.inc.php

@@ -11,9 +11,14 @@ foreach ($_GET as $key => $get_var) {
     }
 }
 
-$segments = explode('/', trim($_SERVER['REQUEST_URI'], '/'));
 $base_url = parse_url($config["base_url"]);
-$segments = explode('/', trim(str_replace($base_url["path"], "", $_SERVER['REQUEST_URI']), '/'));
+// don't parse the subdirectory, if there is one in the path
+if (strlen($base_url["path"]) > 1) {
+    $segments = explode('/', trim(str_replace($base_url["path"], "", $_SERVER['REQUEST_URI']), '/'));
+}
+else {
+    $segments = explode('/', trim($_SERVER['REQUEST_URI'], '/'));
+}
 
 foreach ($segments as $pos => $segment) {
     $segment = urldecode($segment);