Libraries tagged by validation library for PHP

A PHP chess library that is used for chess move generation/validation, piece placement/movement, and check/checkmate/stalemate detection

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Lightweight form validation library for PHP

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Open API 3.0 builder and validation library for PHP that helps you write valid specs.

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Validation library for PHP 5.6+ / HHVM inspired by Joi.

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A comprehensive collection of PHP utility functions for array manipulation, string operations, date handling, HTML generation, form building, validation, and more. Modern PHP 8.2+ library with full type safety.

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A lightweight, fluent validation library for PHP.

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A PHP library for data transformation, type validation, and expression evaluation.

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Email-Guard core library for PHP: local email checks (syntax, reserved TLDs, disposable domains) plus optional escalation to the EmailSherlock Verify API.

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Extensible PHP library for creating, reading and validating electronic invoices such as XRechnung, ZUGFeRD and Factur-X, with support for custom formats.

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Framework-agnostic PHP library for data mapping, DTOs and utilities. Includes DataMapper, SimpleDto/LiteDto, DataAccessor/Mutator/Filter and helper classes (MathHelper, EnvHelper, etc.). Works with Laravel, Symfony/Doctrine or standalone PHP.

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PHP library for SVG manipulation, optimization, and morphing: parsing, building, styling, transforms, validation, and sanitization

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A PHP library for whitelisting, validating, and canonicalizing HTTP request data against a JSON Schema

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A complete PHP utility library for validating, formatting, comparing data, and more.

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Framework-agnostic PHP database library with unified API for MySQL, MariaDB, PostgreSQL, SQLite, MSSQL, and Oracle. Query Builder, caching, sharding, window functions, CTEs, JSON, migrations, ActiveRecord, CLI tools, AI-powered analysis. Zero external dependencies.

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Simple JWT (RFC 7519) encoding/decoding and validation library, for PHP >= 8.2.

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