The CakePHP framework
A library for validating emails against several RFCs
The most awesome validation engine ever created for PHP
PHP Port of Google's libphonenumber
Thin assertion library for input validation in business models.
Handle file uploads with extensible validation and storage strategies
Semver library that offers utilities, version constraint parsing and validation.
Self-validating smart models for Laravel 5's Eloquent ORM
Simple, elegant, stand-alone validation library with NO dependencies
The Illuminate Validation package.
A fast, extensible & stand-alone PHP input validation class that allows you to validate any data
Adds phone number functionality to Laravel and Lumen based on Google's libphonenumber API.
?? Nette Forms: generating, validating and processing secure forms in PHP. Handy API, fully customizable, server & client side validation and mature design.
Eloquent model validating trait.
Flexible Searchable, Mappable, Metable, Validation and more extensions for Laravel Eloquent ORM.
SPDX licenses list and validation library.
A mobile phone number validation solution based on laravel
PHP 5.3 implementation of json schema validation
Tiny do-it-yourself form binding and validation library
File uploader and validation plugin for CakePHP.
Filters to validate and sanitize objects and arrays.
Integration of the respect/validation with Symfony2.1 or higher