How can autoload PSR-4 be utilized to load classes in PHP for form rendering?

To autoload classes in PHP for form rendering using PSR-4, we can define a namespace for our form rendering classes and use a PSR-4 compliant autoloader to automatically load these classes when they are needed.

// Define namespace for form rendering classes
namespace FormRendering;

// Register PSR-4 autoloader
spl_autoload_register(function ($class) {
    // Convert class name to file path
    $file = __DIR__ . '/' . str_replace('\\', '/', $class) . '.php';
    
    // Check if file exists and require it
    if (file_exists($file)) {
        require $file;
    }
});

// Now we can use our form rendering classes without manually including them
$form = new FormRendering\Form();
$form->render();