Easily switch between development, staging, and production environments.
: A deep dive into the loading process, security constants, and how to move core directories like wp-content
<?php return [ 'app' => [ 'env' => getenv('APP_ENV') ?: 'production', 'debug' => getenv('APP_DEBUG') === 'true', 'url' => getenv('APP_URL') ?: 'https://example.com', 'key' => getenv('APP_KEY'), 'timezone' => 'UTC', ], 'db' => [ 'host' => getenv('DB_HOST') ?: '127.0.0.1', 'port' => getenv('DB_PORT') ?: '3306', 'database' => getenv('DB_NAME') ?: 'app_db', 'username' => getenv('DB_USER') ?: 'app', 'password' => getenv('DB_PASS') ?: '', 'charset' => 'utf8mb4', ], 'mail' => [ 'smtp_host' => getenv('SMTP_HOST'), 'smtp_port' => getenv('SMTP_PORT'), 'username' => getenv('SMTP_USER'), 'password' => getenv('SMTP_PASS'), 'encryption' => getenv('SMTP_ENCRYPTION') ?: 'tls', ], ];
DB_HOST="127.0.0.1" DB_USER="production_user" DB_PASS="SuperSecretComplexPassword99!" DB_NAME="live_database" Use code with caution.
While the exact layout varies depending on the Content Management System (CMS) or framework, a typical custom config.php file contains several fundamental components. Here is an anatomy of a standard configuration script: Use code with caution. Key Components Explained: config.php
return [ 'database' => [ 'host' => $_ENV['DB_HOST'], 'name' => $_ENV['DB_NAME'], 'user' => $_ENV['DB_USER'], 'pass' => $_ENV['DB_PASS'], ], 'stripe_secret' => $_ENV['STRIPE_SECRET'], ];
: Instead of defining global variables, the file returns an associative array. This prevents "polluting" the global namespace and allows the configuration to be assigned directly to a variable when included.
Utilizes PHP’s define() function to create immutable, globally accessible variables holding connection parameters.
Avoids accidental credential leaks on public code repositories. Use generated, 24+ character strings for DB keys. Thwarts brute-force network attacks. Here is an anatomy of a standard configuration
Then in index.php , include it using a relative path:
Explicitly tells PHP where the application files reside on the physical server hard drive ( BASE_PATH ) and what the web address is ( SITE_URL ).
Many config files define the absolute path to the root directory. In WordPress, ABSPATH tells the core files where to look for includes and templates.
The attacker's probe slammed against the door of /var/www/html/ . They were hunting for the keys. They were hunting for config.php . set up paths
The file establishes the parameters required to connect to the SQL database.
config.php is a PHP configuration file that contains settings and parameters for a web application. It is a script that defines various constants, variables, and functions that are used throughout the application to connect to databases, set up paths, and configure other essential components. The config.php file serves as a central location for storing configuration data, making it easier to manage and maintain the application.
There are two primary methods for structuring a config.php file: defining constants or returning an array. 1. Using Constants ( define() )
: The coordinates of the massive database server living on another machine.
: Instead of hardcoding secrets, use a .env file or server environment variables. This prevents credentials from being accidentally committed to version control systems like GitHub .