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<?php $dte = new DateTime(date('Y-m-d H:i:s')); var_dump($dte->format('Y-W')); $dte->modify('+4 weeks'); var_dump($dte->format('Y-m-d H:i:s -- Y_W r')); $dte->modify('+1 days'); var_dump($dte->format('Y-m-d H:i:s -- Y_W r'));

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