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<?php
/*
* This file is part of Respect/Validation.
*
* (c) Alexandre Gomes Gaigalas <[email protected]>
* For the full copyright and license information, please view the LICENSE file
* that was distributed with this source code.
*/
declare(strict_types=1);
namespace Respect\Validation\Rules;
use function array_merge;
use function call_user_func_array;
use function count;
/**
* Validates the input using the return of a given callable.
* @author Alexandre Gomes Gaigalas <[email protected]>
* @author Henrique Moody <[email protected]>
* @author William Espindola <[email protected]>
final class Callback extends AbstractRule
{
* @var callable
private $callback;
* @var mixed[]
private $arguments;
* Initializes the rule.
* @param mixed ...$arguments
public function __construct(callable $callback, ...$arguments)
$this->callback = $callback;
$this->arguments = $arguments;
}
* {@inheritDoc}
public function validate($input): bool
return (bool) call_user_func_array($this->callback, $this->getArguments($input));
* @param mixed $input
* @return mixed[]
private function getArguments($input): array
$arguments = [$input];
if (count($this->arguments) === 0) {
return $arguments;
return array_merge($arguments, $this->arguments);