获取某日期后一周、一月、一年的日期 php

//获取某日期后三周同一天日期
public static function getNextDate($date){
    $return = [
        date( 'Y-m-d', strtotime("$date +1 day") ),
        date( 'Y-m-d', strtotime("$date +1 week") ),
        date( 'Y-m-d', strtotime("$date +1 month") ),
        date( 'Y-m-d', strtotime("$date +1 year") ),
    ];

    return $return;
}

//日期之前用-  $date = '2020-10-11';