The CakePHP framework
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
Self-validating smart models for Laravel 5's Eloquent ORM
Simple, elegant, stand-alone validation library with NO dependencies
A fast, extensible & stand-alone PHP input validation class that allows you to validate any data
The Illuminate Validation package.
Eloquent model validating trait.
?? Nette Forms: generating, validating and processing secure forms in PHP. Handy API, fully customizable, server & client side validation and mature design.
A library for validating emails against several RFCs
Adds phone number functionality to Laravel and Lumen based on Google's libphonenumber API.
Flexible Searchable, Mappable, Metable, Validation and more extensions for Laravel Eloquent ORM.
PHP 5.3 implementation of json schema validation
File uploader and validation plugin for CakePHP.
A mobile phone number validation solution based on laravel
Filters to validate and sanitize objects and arrays.
File upload and validation library.....
Stubbles Input enables to handle input data via validation and filtering.
BCE is made to make your live easy. It will help you in building forms very quickly, handles form rendering, both client and server-side validation, and persistance.