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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'));
Output for git.master, git.master_jit, rfc.property-hooks
string(7) "2012-49" string(62) "2012-12-31 14:04:40 -- 2012_01 Mon, 31 Dec 2012 14:04:40 +0100" string(62) "2013-01-01 14:04:40 -- 2013_01 Tue, 01 Jan 2013 14:04:40 +0100"

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