Question 1

How do I validate a form and collect all errors with beberlei/assert?

Accepted Answer

Use the lazy assertions feature: start with `Assert::lazy()->that($value, 'fieldName')->...->verifyNow()` to gather multiple validation errors before throwing an exception, perfect for form validation as shown in the README.

Question 2

beberlei/assert vs Symfony Validator: which is better?

Accepted Answer

Assert is ideal for lightweight, fast validation in low-level code without dependencies, while Symfony Validator suits complex rules, i18n, and Symfony integration. Choose based on project bloat and feature needs.

Question 3

Can I add custom validation rules to Assert?

Accepted Answer

Yes, extend the Assertion class to add your own methods, or use the `satisfy()` method with a callback for custom logic, as mentioned in the documentation on custom assertions.

Question 4

Is Assert compatible with PHP 8?

Accepted Answer

The library supports modern PHP versions; check the Packagist page for specific requirements, but it's regularly updated and widely used in PHP 7.4+ and 8.x environments.

Question 5

How to handle nullable values in Assert?

Accepted Answer

Use the `nullOr*` helper methods, such as `Assertion::nullOrString($value)`, which validates only if the value is not null, as explained in the NullOr helper section.

Question 6

What's the performance impact of using Assert?

Accepted Answer

Assert is designed to be fast with minimal overhead, but in performance-critical paths, the exception throwing might add cost; profile your code to ensure it meets your needs.

Assert

What is Assert?

Overview

Use Cases

Best For

Related Projects

Found a gem we're missing?

Not Ideal For

Pros & Cons

Pros

Cons

Frequently Asked Questions