explaingit

respect/validation

Analysis updated 2026-06-26

★ 5,938PHPAudience · developerComplexity · 2/5LicenseSetup · easy

TLDR

Respect/Validation is a PHP library with 150+ built-in rules for checking user input, letting you chain conditions like must be a positive number between 1 and 255 in a single readable line of code.

Mindmap

mindmap
  root((Respect Validation))
    What it does
      Input validation
      Chainable rules
      Error messages
    Built-in validators
      Data types
      String formats
      Numeric ranges
      150+ total
    Setup
      Composer install
      Packagist package
      Framework-agnostic
    Audience
      PHP developers
      API builders
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Code map

Detail Auto

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filefunction / class

What do people build with it?

USE CASE 1

Validate a web form's email, age range, and required fields in a PHP application using chainable one-line rules.

USE CASE 2

Add input validation to a PHP API endpoint to reject bad data before it reaches your database.

USE CASE 3

Replace scattered if-checks in a PHP project with readable, testable validation chains.

What is it built with?

PHPComposerPackagist

How does it compare?

respect/validationitsgoingd/clockworkpassbolt/passbolt_api
Stars5,9385,9405,898
LanguagePHPPHPPHP
Setup difficultyeasymoderatemoderate
Complexity2/53/53/5
Audiencedeveloperdeveloperops devops

Figures from each repo's GitHub metadata at analysis time.

How do you get it running?

Difficulty · easy Time to first run · 5min
Use freely for any purpose, including commercial use, as long as you keep the copyright notice.

In plain English

Respect/Validation is a PHP library that handles input validation, meaning it checks whether data coming into your application meets the rules you have set. If you are building a website or API in PHP and need to verify that a submitted number is within a certain range, or that an email address looks correct, this library does that work for you. The library is designed so that you can chain multiple rules together in a single readable line. For example, you can check that something is a number, that it is positive, and that it falls between 1 and 255, all in one statement. This makes the code easier to read than writing separate if-checks for each condition. It ships with more than 150 built-in validators covering common needs like checking data types, string formats, numeric ranges, and more. Each validator is fully tested by the project team. It also includes tools for handling the error messages that come back when validation fails, so you can give users clear feedback about what went wrong. The project is open source under the MIT license and is distributed through Packagist, which is the standard package registry for PHP projects. It is marked as a standalone component, meaning it can be added to an existing PHP project without requiring a particular framework. Documentation is hosted separately and covers the full list of available validators along with guides on contributing to the project.

Copy-paste prompts

Prompt 1
Using Respect/Validation in PHP, validate that a submitted value is a positive integer between 1 and 255 and show a clear error message if it fails.
Prompt 2
Show me how to chain multiple Respect/Validation rules to validate an email address, check it is not empty, and return a user-friendly error on failure.
Prompt 3
How do I add Respect/Validation to a plain PHP project via Composer and validate a form with name, email, and age fields?
Prompt 4
Using Respect/Validation, write a custom validator that checks whether a PHP string is a valid UUID.

Frequently asked questions

What is validation?

Respect/Validation is a PHP library with 150+ built-in rules for checking user input, letting you chain conditions like must be a positive number between 1 and 255 in a single readable line of code.

What language is validation written in?

Mainly PHP. The stack also includes PHP, Composer, Packagist.

What license does validation use?

Use freely for any purpose, including commercial use, as long as you keep the copyright notice.

How hard is validation to set up?

Setup difficulty is rated easy, with roughly 5min to a first successful run.

Who is validation for?

Mainly developer.

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