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Get friday 13th
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| <?php | |
| /** | |
| * @param int $fromYear Year from you want started search fridays 13th | |
| * @param int $toYear Year up to you want end with search fridays 13th | |
| * | |
| * @return DateTimeImmutable[] | |
| */ | |
| function getFridays13th(int $fromYear, int $toYear) : array { | |
| $fridays = []; | |
| $startDate = new DateTimeImmutable("{$fromYear}-01-01 Friday"); | |
| $endDate = new DateTimeImmutable("{$toYear}-12-31"); | |
| $interval = new DateInterval('P7D'); | |
| foreach(new DatePeriod($startDate, $interval, $endDate) as $d) { | |
| if (intval($d->format('j')) == 13) { | |
| $fridays[] = $d; | |
| } | |
| } | |
| return $fridays; | |
| } | |
| $fridays = getFridays13th(2019, 2025); | |
| array_walk($fridays, function($item) { | |
| echo $item->format('d. m. Y') . PHP_EOL; | |
| }); |
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| 13. 09. 2019 | |
| 13. 12. 2019 | |
| 13. 03. 2020 | |
| 13. 11. 2020 | |
| 13. 08. 2021 | |
| 13. 05. 2022 | |
| 13. 01. 2023 | |
| 13. 10. 2023 | |
| 13. 09. 2024 | |
| 13. 12. 2024 | |
| 13. 06. 2025 |
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