PHP › Form Handling & Validation

How do modern PHP frameworks like Laravel simplify form validation compared to writing manual validation checks by hand?

Intermediate

Answer

Modern frameworks like Laravel provide a dedicated validation system that lets you define validation rules for each form field using a concise, declarative syntax, automatically running all the specified checks, collecting any resulting error messages, and even automatically redirecting back to the form with those errors and the previously submitted input if validation fails, significantly reducing the amount of repetitive, manual validation code you would otherwise need to write for every single form in your application.

$validated = $request->validate([
    'email' => 'required|email',
    'age' => 'required|integer|min:18',
]);

Real-world example A Laravel application defines its registration form's validation rules in a single concise array, letting the framework automatically handle running every check and displaying appropriate error messages if any rule fails, rather than writing dozens of individual manual if statements.

Common follow-ups: How do you define a completely custom validation rule in Laravel beyond the built in ones?;What happens automatically in Laravel if a validation check fails during a form submission?

Laravel Framework Essentials;Security