Simple, multilingual, standalone PHP Validator library - Validatr.

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v2.0.0-beta 2014-03-26 20:20 UTC


Validatr is a simple multilingual Php Validator library for checking user's data.

  • Simple form for rules and errors messages
  • Flexible and extendable with your callbacks rules functions
  • Enjoyment!

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

What's new in 2.0 version?

  • More rules
  • More compact creating rules
  • More powerful and flexible

Table of contents

Getting started

  1. Php >= 5.3.0 is required
  2. Install Validatr convenient for you
  3. Check your data with Validatrs rules
  4. Enjoy!


1) Via composer

    "require": {
        "boomerang/validatr": "dev-master"

To download the library run the command:

$ php composer.phar update boomerang/validatr

2) Git clone

git clone

3) 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">
    <label for="name">Name</label>
    <input type="text" name="name" id="name" /><br/>

    <label for="password">Password</label>
    <input type="password" name="password" id="password" /><br/>

    <label for="email">Email</label>
    <input type="email" name="email" id="email" /><br/>

    <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 = array (
    '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!'

require_once '../library/Validator.php';
$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);




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 Duplii - Boomerang

Email -

Inspired by:

Copyright and License

Copyright 2014 Boomerang, Inc. under the MIT license.