Debug mode in Laravel - Practice Problems & Coding Challenges

Challenge - 5 Problems

🔧 Debug

intermediate

What error message appears when debug mode is off and an exception occurs?

In Laravel, if APP_DEBUG is set to false in the .env file, what will the user see when an exception happens?

A The application crashes with a blank white screen

B A detailed stack trace with error message and code lines

C The raw exception message printed on the screen

D A generic error page with a simple message like 'Whoops, something went wrong.'

💡 Hint

Think about what Laravel shows to protect sensitive info when debug is off.

When APP_DEBUG=false, Laravel shows a generic error page to avoid exposing sensitive details. The detailed stack trace only appears when debug is on.

🔧 Debug

intermediate

Which .env setting enables detailed error messages in Laravel?

To see detailed error messages and stack traces during development, which setting in the .env file must be set?

A APP_DEBUG=true

B APP_ENV=production

C APP_LOG_LEVEL=error

D APP_DEBUG=false

💡 Hint

This setting controls whether Laravel shows detailed errors or not.

Setting APP_DEBUG=true enables detailed error messages and stack traces in Laravel, useful for development.

❓ component_behavior

advanced

What happens if you set APP_DEBUG=true in production?

If you accidentally set APP_DEBUG=true on a live Laravel site, what is the likely outcome when an error occurs?

A The application crashes and stops responding

B Users see detailed error info including file paths and code, risking security

C Errors are logged silently without showing anything to users

D The site automatically disables debug mode for security

💡 Hint

Think about what detailed error info might reveal to outsiders.

Enabling debug mode in production exposes sensitive information like file paths and code, which can be a security risk.

📝 Syntax

advanced

Which code snippet correctly reads the debug mode setting in Laravel?

Which of the following PHP code snippets correctly checks if debug mode is enabled in Laravel?

A if (config('app.debug')) { /* debug is on */ }

B if (env('APP_DEBUG') == true) { /* debug is on */ }

C if (app()->debug) { /* debug is on */ }

D if (getenv('APP_DEBUG') === 'true') { /* debug is on */ }

💡 Hint

Laravel recommends using the config helper for settings.

The config('app.debug') call reads the debug setting properly. Using env() directly is discouraged outside config files.

❓ state_output

expert

What is the output of this Laravel error page when APP_DEBUG=false?

Given the following Laravel error page snippet, what will the user see if APP_DEBUG=false?

Exception: Division by zero in Calculator.php line 42

Stack trace:
#0 ...

A The full exception message and stack trace as shown

B A blank page with no content

C A simple error page with message 'Whoops, something went wrong.' without details

D A JSON response with error details

💡 Hint

Remember what Laravel hides when debug is off.

When APP_DEBUG=false, Laravel hides exception details and shows a generic error page to users.