What are the best practices for managing global constants in PHP to avoid scope-related issues?

Global constants in PHP can be managed effectively by defining them within a dedicated configuration file and including that file in all relevant scripts. This approach ensures that the constants are available globally without polluting the global namespace. By using constants, you can avoid scope-related issues that may arise from using global variables. 

// config.php
define('SITE_NAME', 'My Website');
define('DB_HOST', 'localhost');
define('DB_USER', 'root');
define('DB_PASS', 'password');

// index.php
include 'config.php';

echo SITE_NAME;
// Output: My Website

Keywords

global constants PHP scope define() constant

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