NonNegIntValidator.php

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<?php
 
declare(strict_types=1);
 
namespace ILIAS\MetaData\Repository\Validation\Data;
 
use ILIAS\MetaData\Elements\ElementInterface;
 
class NonNegIntValidator implements DataValidatorInterface
{
    use DataFetcher;
 
    public function isValid(
        ElementInterface $element,
        bool $ignore_marker
    ): bool {
        return (bool) preg_match('/^\d+$/', $this->dataValue($element, $ignore_marker));
    }
}