From 34d58b5222a1dbd07c3bc2a3645394331744b509 Mon Sep 17 00:00:00 2001
From: Patrick O'Meara <pat@fixd.io>
Date: Thu, 18 Feb 2021 00:50:33 +1100
Subject: [PATCH] Check for closure before class exists (#36293)

* class_exists on a closure throws an exception in PHP8
---
 src/Illuminate/Routing/Router.php | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/Illuminate/Routing/Router.php b/src/Illuminate/Routing/Router.php
index f0f167228050..dfdb7ae7332e 100644
--- a/src/Illuminate/Routing/Router.php
+++ b/src/Illuminate/Routing/Router.php
@@ -712,7 +712,13 @@ public function gatherRouteMiddleware(Route $route)
         })->flatten()->reject(function ($name) use ($excluded) {
             if (empty($excluded)) {
                 return false;
-            } elseif (in_array($name, $excluded, true)) {
+            }
+
+            if ($name instanceof Closure) {
+                return false;
+            }
+
+            if (in_array($name, $excluded, true)) {
                 return true;
             }