两个日期之间的所有时间

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function DateRange ($begin,$end,$interval='M'){
    $begin = new DateTime($begin);
    $end   = new DateTime($end);
    $end = $end->modify('+1 day');
    $t ='P1'.$interval;
    $interval = new DateInterval($t);
    $daterange = new DatePeriod($begin, $interval ,$end);
 
    foreach($daterange as $date){
        $range[]= $date->format("Ymd");
    }
    return $range;
}

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