为什么laravel应用程序不读取我的代码?

i have a form storing data into database ( text and images), it was working fine. but now, when im trying to upload, it does not read my code from controller. im changing the code in controller but it read the old codes and return message. is it about the cache? from where it reads the codes and executing them?

all routes and methods are correct. actually i have tried php artisan cache:clear and php artisan config:clear but it does not worked. i dont know from where it finds and reads the codes to execute? using laravel 5.4