Fügen Sie ein Jahr PHP hinzu
$end = date('Y-m-d', strtotime('+5 years'));
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$end = date('Y-m-d', strtotime('+5 years'));//variable date
$date = "2022-02-01";
$newDate = date('Y-m-d', strtotime($date. ' + 3 years'));
//curent date
$newDate = date('Y-m-d', strtotime(' + 3 years'));