Retrieve and Override Configurations with the config() Helper

Use config('app.name') to retrieve settings and config(['app.debug' => true]) to set runtime overrides.

The config() helper accesses application configuration options defined in config/*.php files. You can also pass key-value arrays to override configurations dynamically during testing or request execution.

// Retrieve config value with fallback default
$appName = config('app.name', 'Laravel');

// Override config value dynamically at runtime
config(['services.stripe.key' => 'pk_test_12345']);

• Dot-notation syntax accesses nested configuration array keys
• Passing key-value arrays overrides configurations dynamically for current request
• Always use config() instead of env() outside config directory files