How can autoloading classes and grouping functions within classes improve code organization and reusability in PHP projects?

Autoloading classes and grouping functions within classes can improve code organization and reusability in PHP projects by allowing for better structuring of code into logical units, reducing the chances of naming conflicts, and promoting encapsulation. Autoloading classes helps in efficiently managing dependencies and ensures that classes are loaded only when needed. Grouping functions within classes promotes better organization and encapsulation, making it easier to reuse code and maintain codebases.

// Autoloading classes using spl_autoload_register
spl_autoload_register(function ($class) {
    include 'classes/' . $class . '.php';
});

// Example of grouping functions within a class
class MathFunctions {
    public static function add($num1, $num2) {
        return $num1 + $num2;
    }

    public static function subtract($num1, $num2) {
        return $num1 - $num2;
    }
}

// Usage of the MathFunctions class
echo MathFunctions::add(5, 3); // Outputs: 8
echo MathFunctions::subtract(5, 3); // Outputs: 2