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<?php /* * This file is part of Respect/Validation. * * (c) Alexandre Gomes Gaigalas <alexandre@gaigalas.net> * * For the full copyright and license information, please view the "LICENSE.md" * file that was distributed with this source code. */ namespace Respect\Validation\Rules; use DateTime; class LeapYear extends AbstractRule { public function validate($year) { if (is_numeric($year)) { $year = (int) $year; } elseif (is_string($year)) { $year = (int) date('Y', strtotime($year)); } elseif ($year instanceof DateTime) { $year = (int) $year->format('Y'); } else { return false; } $date = strtotime(sprintf('%d-02-29', $year)); return (bool) date('L', $date); } }