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Filename : ParameterNormalizer.php

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<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Component\Cache\Adapter;

/**
 * @author Lars Strojny <lars@strojny.net>
 */
final class ParameterNormalizer
{
    public static function normalizeDuration(string $duration): int
    {
        if (is_numeric($duration)) {
            return $duration;
        }

        if (false !== $time = strtotime($duration, 0)) {
            return $time;
        }

        try {
            return \DateTime::createFromFormat('U', 0)->add(new \DateInterval($duration))->getTimestamp();
        } catch (\Exception $e) {
            throw new \InvalidArgumentException(sprintf('Cannot parse date interval "%s".', $duration), 0, $e);
        }
    }
}