What are the best practices for managing variables across multiple PHP files without using the include() function?

When managing variables across multiple PHP files without using the include() function, one common approach is to use sessions or cookies to store and retrieve the variables. This allows for data to be shared between different files without the need for including them directly. Another method is to use a database to store and retrieve the variables, providing a centralized location for data management. 

// Using sessions to manage variables across multiple PHP files
session_start();

// Set a variable
$_SESSION['username'] = 'JohnDoe';

// Retrieve the variable in another PHP file
session_start();
echo $_SESSION['username'];

Keywords

variable scope global keyword namespaces autoloaders dependency injection

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