: It makes it easier to move a site from a local "development" server to a live "production" server by only updating the config values. Standard Best Practices 1. File Location and Security
In the sprawling architecture of a dynamic web application, certain files capture the lion’s share of attention. index.php is the celebrated front door. style.css is the curated aesthetic. database.sql is the fortified vault of data. Yet, lurking in the root directory—often overlooked and taken for granted—lies one of the most critical files in the entire system: config.php . Though modest in name and often brief in length, this file is the unsung keystone of security, maintainability, and functionality in PHP-based web projects. config.php
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. Detailed Report: config
Here's an example of a basic config.php file: Third-party services Portability : It makes it easier