mitigate accidental method route traversal

composer.json

@@ -1,7 +1,7 @@
 {
     "name": "sharkk/router",
     "description": "A simple node-based router.",
-	"version": "1.2.6",
+	"version": "1.2.7",
     "type": "library",
     "license": "MIT",
     "autoload": {

src/Router.php

@@ -71,8 +71,8 @@ class Router
 
 		// we'll split up the URI into segments and traverse the node tree
 		foreach (explode('/', trim($uri, '/')) as $segment) {
-			// if there is a node for this segment, move to it
-			if (isset($node[$segment])) {
+			// check that the next segment is an array (not a callable) and exists, then move to it
+			if (isset($node[$segment]) && is_array($node[$segment])) {
 				$node = $node[$segment];
 				continue;
 			}