PHP Validator

Validation library lets you configure, rather than code, your validation logic.

Installation

composer require redot/validator

Testing

composer test

Usage

After registering the rules that you want to use, you can use the validator like this:

use Redot\Validator\Validator;

/* Instantiate a new validator */
$validator = new Validator($email);

/* Or you can use the static method init */
$validator = Validator::init($email);

/* Apply your rules */
$validator->email()->required()->max(255);

if (!$validator->validate()) {
    return $validator; // validation result in JSON format
}

Also, you can validate multiple values at once:

$errors = Validator::initMultiple($_POST, [
    'email' => 'email',
    'password' => 'required|min:6|max:255'
]);

if (count($errors)) {
    // do something
}

Note that multiple validations return an array of failures rather than a Validator instance.

Btw, you can validate values statically:

$isEmail = Validator::email('admin@example.com'); // true

Registering rules

The validator came without any registered rules by default. You can add them by using the Validator::addRule() method.

use Redot\Validator\Rules\RequiredRule;

Validator::addRule(RequiredRule::class);

Also you can load the default rules by using the Validator::loadDefaultRules() method.

Validator::loadDefaultRules();

Loading the default rules will register the following rules:

Rule	Description	Parameters
alpha	The value must contain only alphabetic characters.	-
between	The value must be between the given min and max.	min: int, max: int
contains	The value must contain all the given values.	mixed[]
doesntContain	The value must not contain all the given values.	mixed[]
each	The value must be an array and each item must pass the given rule.	callable
email	The value must be a valid email address.	-
equal	The value must be equal to the given value.	mixed
date	The value must be a valid date.	-
max	The value must be less than or equal to the given value.	int
min	The value must be greater than or equal to the given value.	int
pattern	The value must match the given pattern.	string
required	The value must be present.	-
string	The value must be a string.	-
number	The value must be a number.	-
array	The value must be an array.	-

You can submit a pull request to add a new rule.

Custom rules

If you have a specific rule you want to use, you can create a class that extends Validator\AbstractRule and register it.

class CustomRule extends AbstractRule
{
    protected string $message = '...';

    public function getName(): string
    {
        // name will be used to call the rule
    }

    public function validate(mixed $value, mixed ...$params): bool
    {
        // validation logic
    }
}

Custom messages

If you want to customize the error messages, you can use the Validator::setMessages() method.

Validator::setMessages([
    'required' => 'The value is required.',
    'email' => 'The value is not a valid email.',
    'max' => 'The value should be less than or equal to {0}.',
]);

Note that you can pass parameters to the message using {x} placeholders where x is the index of the parameter.

That's it. Enjoy 👌!