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<?php $day = '01'; var_dump(is_numeric($day)); var_dump(ctype_digit($day)); $a = mktime(0, 0, 0, date('m'), date('d') + $day, date('Y')); var_dump($a);
Output for git.master, git.master_jit, rfc.property-hooks
bool(true) bool(true) int(1540854000)

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