dhii / validator
A thin, standards-compliant validator implementation.
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Requires
- php: ^7.1 | ^8.0
- dhii/validation-interface: ^0.3.0-alpha3
Requires (Dev)
- phpunit/phpunit: ^7.1 | ^8.0 | ^9.0
- slevomat/coding-standard: ^6.0
- vimeo/psalm: ^3.11.7 | ^4.0
This package is auto-updated.
Last update: 2024-10-22 19:52:00 UTC
README
A thin, standards-compliant validator implementation of dhii/validation-interface
.
Details
This is a super-lightweight validation library that allows easy creation of validation structures of arbitrary depth.
Examples
A validator ensures values are valid usernames. It is a composite validator, comprised of 2 simple validators:
- Ensures values are alphanumeric strings.
- Ensures value lengths are less than or equal to 30 characters.
This validator hierarchy throws a hierarchy of exceptions when failing:
- Composite validator's failure exception reports how many failures occurred, and exposes failure exceptions from the simple validators.
- Those in turn report what exactly was invalid.
use Dhii\Validation\Exception\ValidationFailedExceptionInterface;use Dhii\Validator\CallbackValidator; use Dhii\Validator\CompositeValidator; $alphanum = new CallbackValidator(function ($value) { if (preg_match('![^\d\w]!', $value, $matches)) { return sprintf('Value "%1$s" must be alphanumeric, but contains char "%2$s"', $value, $matches[0][0]); } }); $chars30 = new CallbackValidator(function ($value) { $length = strlen($value); if (!($length <= 30)) { return sprintf('Value "%1$s" is limited to 30 characters, but is %2$d characters long', $value, $length); } }); $usernameValidator = new CompositeValidator([$alphanum, $chars30]); // Valid username: nothing happens $usernameValidator->validate('abcdef'); // Invalid username value: exception thrown try { $percentValidator->validate('abcdefghijklmnopqrstuvwxyz!@#$%'); } catch (ValidationFailedExceptionInterface $e) { // Validation failed with 2 errors. echo $e->getMessage(); // 1: Value "abcdefghijklmnopqrstuvwxyz!@#$%" must be alphanumeric, but contains char "!" // 2: Value "abcdefghijklmnopqrstuvwxyz!@#$%" is limited to 30 characters, but is 31 characters long foreach ($e->getValidationErrors() as $error) { echo (string) $error; } }