What is the .env file in Laravel?
Why Interviewers Ask This
This is a classic screening question for Laravel roles. Hiring managers ask it early in interviews to gauge your baseline understanding and determine if you can communicate technical concepts clearly.
Answer
The .env file stores environment-specific configuration values that should not be committed to version control (database credentials, API keys, mail settings). Laravel uses the dotenv library to load this file. Access values with env("DB_HOST", "localhost") (second argument is the default). Configuration files in config/ use env() to read .env values — always access configuration through config("database.connections.mysql.host") in application code, not env() directly (config values are cached). The .env.example file is committed to VCS as a template. Never commit the actual .env file — add it to .gitignore.
Pro Tip
This topic has Laravel-specific nuances that differ from general programming. Highlighting those nuances in your answer shows expertise rather than generic knowledge.