// Get form data $name = $_POST['name']; $email = $_POST['email']; // Validate form data if(empty($name)) { $errors[] = "Name is required. "; } if(!filter_var($email, FILTER_VALIDATE_EMAIL)) { $errors[] = "Invalid email format. "; } // Display form errors if(!empty($errors)) { echo "
all(), [ 'name' => 'required', 'email' => 'required|email', ]); // Redirect with error message if there's an error if ($validator->fails()) { return redirect('form') ->withErrors($validator) ->withInput(); } ?>In summary, form errors can be handled in different ways, depending on the requirements of the project and the package library used. Some popular PHP packages for form validation and error handling are Symfony Form, Laravel Form Validation, and Zend Framework.