What are the best practices for managing global definitions in PHP scripts?

When managing global definitions in PHP scripts, it is best practice to use constants to define global values that should not be changed throughout the script. This helps maintain consistency and readability in the code. Additionally, using a separate configuration file to store these global definitions can make it easier to update them in one central location. 

// config.php
define('DB_HOST', 'localhost');
define('DB_USER', 'username');
define('DB_PASS', 'password');
define('DB_NAME', 'database_name');
```

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

// Connect to the database using the defined constants
$connection = mysqli_connect(DB_HOST, DB_USER, DB_PASS, DB_NAME);

Keywords

global variables constants namespaces configuration files autoloaders

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