Simple, multilingual, standalone PHP Validator class - Validatr.

v3.0.0-alpha 2016-04-06 13:28 UTC



Build Status

Validatr is a simple multilingual PHP Validation library for checking user's data.

  • Simple form for rules and errors messages
  • Flexible and extendable library with your callback rules
  • Enjoyment!

Validatr is a standalone PHP class, which can be extended for your needs.

Table of contents

Getting started

  1. PHP >= 5.4 is required
  2. Install Validatr convenient for you
  3. Check your data with Validatrs rules
  4. Enjoy!


  1. Via composer
    "require": {
        "boomerang/validatr": "~3.0"

To download the library run the command:

$ php composer.phar require boomerang/validatr


$ composer require boomerang/validatr
  1. Git clone
git clone
  1. Download

Download .zip

Unzip it and copy the directory into your PHP project directory.

How to use

Simple Form

<form action="post.php" method="POST">

    <input type="text" name="name" id="name" placeholder="Name" />
    <input type="password" name="password" id="password" placeholder="Name" />
    <input type="email" name="email" id="email" placeholder="Name" />

    <label for="checkbox">Checkbox</label>
    <input type="hidden" name="checkbox" value="0" />
    <input type="checkbox" name="checkbox" id="checkbox" value="1" /><br/>

    <input type="submit" />


Form Handler with Validatr class

// Set rules for some fields in form
$rules = [
    'name' => 'required|min:3|max:15|equal:Awesome:[s]',
    'password' => 'required|min:3|custom_equal:OK', // Custom rule, defined below
    'email' => 'required|email',
    'checkbox' => 'bool'

// Your error messages on your language
$messages = array (
    'name' => array (
        'required' => 'Поле обязательно для заполнения',
        'min' => 'Minimum required 3 characters',
        'max' => 'Maximal zulässige fünfzehn Zeichen',
        'equal' => 'Значение должно равняться - Awesome'
    'password' => array (
        'required' => 'Поле обязательно для заполнения',
        'min' => 'Minimalement acceptables 3 caractères',
        'custom_equal' => 'Кастомное сообщение для правила custom_equal'
    'checkbox' => array (
        'bool' => 'Вы не выставили галочку!'

$validator = new \Validatr\Validator();

// Adding custom rule
$validator->addRule('custom_equal', function($dataValue, $ruleValue){
    return ($dataValue == $ruleValue) ? true : false;

$result = $validator->validate($_POST, $rules, $messages);

echo "<pre>";
echo "</pre>";

Set messages


Return Values

Method validate() returns one of two types:

AN ARRAY containing in keys names of form fields and in values nested associative array containing in keys validation rules and in values error messages. (See below example).


A BOOLEAN value of TRUE if the validation was successful.

Return values example:

The result may be (if all fields were sent empty):

    [name] => Array
            [required] => Поле обязательно для заполнения
            [min] => Minimum required 3 characters
            [equal] => Значение должно равняться - Boss

    [password] => Array
            [required] => Поле обязательно для заполнения
            [min] => Minimalement acceptables 3 caractères

    [email] => Array
            [required] => This field is required
            [email] => Invalid email address

    [checkbox] => Array
            [bool] => Вы не выставили галочку!


Or if all fields was validated successfully:


Available rules:

- required  // Checks if field's value is not empty
- min       // Checks if the number of characters of field's value not less than rule value (UTF-8)
- max       // Checks if the number of characters of field's value not greater than rule value (UTF-8)
- email     // Checks if field's value is a valid email adress
- numeric   // Checks if field contains only numeric value
- bool      // Checks if field's value is boolean
- alpha     // Checks if field's value contains only alphabetic characters (UTF-8)
- alnum     // Checks if field's value contains only alphabetic and numeric characters (UTF-8)
- alnumWith // Checks if field's value contains only alphabetic and numeric characters (UTF-8) and some else custom characters
- in        // Checks if value is included in the given list of values.
- notIn     // Checks if value is not included in the given list of values.
- equal     // checks if value is equal to rule value (Strict or not)
- notEqual  // checks if value is bot equal to rule value (Strict or not)

Creating your own validating rules

For creating your own validating rules use addRule method.

// Lets create our own 'equal' rule.

$data = array (
    'name' => 'ok'

$rules = array(
    'name' => 'custom_equal:OK:strict:upper'

$messages = array(
    'name' => array(
        'custom_equal' => 'The value must be equal "ok"'

// The callback function may receives three arguments:
// 1st arg - field value - 'ok' (From $data)
// 2nd arg - rule value - 'OK' (From $rules 2nd param)
// 3rd arg - additional params - array (From $rules starting 3nd and more params)

// $params in this example is an array - array('strict', 'upper'); But not used
// It should return a boolean value indicating whether the value is valid.
$validator->addRule('custom_equal', function($dataValue, $ruleValue, $params){
    return ($dataValue == $ruleValue) ? true : false;

$result = $validator->validate($data, $rules, $messages);


  1. Fork it
  2. Create your feature branch (git checkout -b my-new-feature)
  3. Make your changes
  4. Write the unit tests for your new feature (phpunit)
  5. Commit your changes (git commit -am 'Add some feature')
  6. Push to the branch (git push origin my-new-feature)
  7. Create new Pull Request


Validatr is maintained under the Semantic Versioning guidelines. Sometimes we screw up, but we'll adhere to these rules whenever possible.

Releases will be numbered with the following format:


And constructed with the following guidelines:

  • Breaking backward compatibility bumps the major while resetting minor and patch
  • New additions without breaking backward compatibility bumps the minor while resetting the patch
  • Bug fixes and misc changes bumps only the patch

For more information on SemVer, please visit

Brazenly copied from Bootstrap's =)


Alex D.

Inspired by:

Copyright and License

Copyright 2016 Alex D, licensed under the MIT.