: Encryption keys used for sessions or data protection.
If you have any whitespace or HTML before the opening <?php tag in config.php , sessions and cookies will break. Always ensure no BOM, no spaces, no nothing before <?php . And omit the closing ?> tag entirely—it's optional and dangerous.
The config.php file is a cornerstone of most PHP applications. Its primary purpose is to centralize settings that control how your application behaves across different environments (e.g., development, staging, production). config.php
For object-oriented projects, treat configuration as a class.
To get the most out of config.php , follow these best practices: : Encryption keys used for sessions or data protection
// 4. Site Configuration $config['site'] = [ 'name' => 'My Awesome App', 'url' => 'https://www.myawesomeapp.com', 'timezone' => 'America/New_York' ];
Business logic (how an application works) should never mix with configuration values (how the application is set up). config.php enforces this boundary. And omit the closing
// Site settings define('SITE_NAME', 'Your Website'); define('SITE_URL', 'https://example.com');