What is a good form validator for php?

Question

PHP

Google, of course, to help, but I want to know which form validators for php are really viable and can be used in real projects?
If it's easy, briefly indicate the pros, cons and a link to the source. If there is a Git repository, I think I can find it myself.

Answer 1

Stop writing bicycles. Before, the thought often came to me, they say, "what's the point of dragging a framework, the application is the simplest." Then there are sessions, connections in the database, the need for migration .. And you think "to hell with all this, I'll take the framework."
Laravel/Symfony are your friends.)

Answer 2

Symfony Validator https://github.com/symfony/validator
So far I haven't been able to find conditions that it couldn't check :) But keep in mind that this is not so much a form validator as an object validator.

Answer 3

https://github.com/auraphp/Aura.Filter

Answer 4

Used this one on many projects https://github.com/vlucas/valitron