我無法診斷的Slim庫文件NotFound.php中的錯誤

Question

我有一個使用苗條框架的在線應用程序。該網站似乎工作正常，但當我檢查錯誤日誌，我得到下面。

[Mon Apr 17 13:26:45.349695 2017] [:error] [pid 30816] [client xx.xxx.xx.133:39856] PHP Notice: Undefined offset: 0 in /var/www/Sites/appName/vendor/slim/slim/Slim/Handlers/NotFound.php on line 80 
[Mon Apr 17 13:26:45.349755 2017] [:error] [pid 30816] [client xx.xxx.xx.133:39856] PHP Notice: Undefined variable: output in /var/www/Sites/appName/vendor/slim/slim/Slim/Handlers/NotFound.php on line 61 
[Wed Apr 19 22:14:32.271000 2017] [:error] [pid 13509] [client xx.xxx.xx.251:59585] PHP Notice: Undefined offset: 0 in /var/www/Sites/appName/vendor/slim/slim/Slim/Handlers/NotFound.php on line 80 
[Wed Apr 19 22:14:32.271546 2017] [:error] [pid 13509] [client xx.xxx.xx.251:59585] PHP Notice: Undefined variable: output in /var/www/Sites/appName/vendor/slim/slim/Slim/Handlers/NotFound.php on line 61 
[Thu Apr 20 15:07:51.858254 2017] [:error] [pid 16996] [client xx.xxx.xx.61:37389] PHP Notice: Undefined offset: 0 in /var/www/Sites/appName/vendor/slim/slim/Slim/Handlers/NotFound.php on line 80 
[Thu Apr 20 15:07:51.858844 2017] [:error] [pid 16996] [client xx.xxx.xx.61:37389] PHP Notice: Undefined variable: output in /var/www/Sites/appName/vendor/slim/slim/Slim/Handlers/NotFound.php on line 61 
[Fri Apr 21 10:27:05.650765 2017] [:error] [pid 20800] [client xx.xxx.xx.224:49737] PHP Notice: Undefined offset: 0 in /var/www/Sites/appName/vendor/slim/slim/Slim/Handlers/NotFound.php on line 80 
[Fri Apr 21 10:27:05.651262 2017] [:error] [pid 20800] [client xx.xxx.xx.224:49737] PHP Notice: Undefined variable: output in /var/www/Sites/appName/vendor/slim/slim/Slim/Handlers/NotFound.php on line 61 
[Sat Apr 22 14:27:29.531275 2017] [:error] [pid 25129] [client xx.xxx.xx.62:59309] PHP Notice: Undefined offset: 0 in /var/www/Sites/appName/vendor/slim/slim/Slim/Handlers/NotFound.php on line 80 
[Sat Apr 22 14:27:29.531323 2017] [:error] [pid 25129] [client xx.xxx.xx.62:59309] PHP Notice: Undefined variable: output in /var/www/Sites/appName/vendor/slim/slim/Slim/Handlers/NotFound.php on line 61 

我試圖自己診斷這一點，但沒有得到很遠。任何人都可以指出我正確的方向來試圖找出這兩個錯誤的原因嗎？

Answer 1

Line 80 of NotFound.php是一個右大括號。

因此，我推測你沒有安裝最新版本的Slim 3，所以請先更新到最新版本。