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<?php date_default_timezone_set('Asia/Tokyo'); for ($i = 0; $i < 10; $i++) { $date = new DateTime('2018-01-31'); $date->modify((int) ($i + 2).' month'); var_dump($date->format('Y-m-d H:i') ."　→　" . $date->format('Y-m-27')); echo PHP_EOL; }
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57.31 ms | 402 KiB | 5 Q