What are some user-friendly alternatives to complex PHP functions in form handling for better usability?

Complex PHP functions in form handling can be difficult for users to understand and use, leading to potential errors and frustration. To improve usability, consider using simpler and more user-friendly alternatives such as using built-in PHP functions like filter_input() for input validation and sanitization, or using libraries like Symfony Form component for form creation and handling.

// Using filter_input() for input validation and sanitization
$username = filter_input(INPUT_POST, 'username', FILTER_SANITIZE_STRING);

// Using Symfony Form component for form handling
use Symfony\Component\Form\Extension\Core\Type\TextType;
use Symfony\Component\Form\Extension\Core\Type\SubmitType;

$form = $this->createFormBuilder()
    ->add('username', TextType::class)
    ->add('submit', SubmitType::class, ['label' => 'Submit'])
    ->getForm();