PHP method to obtain the previous month, this month, the last 15 days, and the last 30 days

This article mainly introduces the method of PHP to simply obtain the last month, this month, the last 15 days, and the last 30 days. It also analyzes the operation skills related to date and timestamp conversion encapsulated by PHP through custom functions in the form of examples. It requires Friends can refer to

for details as follows:

/**
 * 获取统计时间
 * @param $type
 * 1 上月
 * 2 本月
 * 3 近15天
 * 4 近30天
 * @return array
 */
function getDateInfo($type)
{
  $data = array(
    array(
      'firstday' => date('Ym01', strtotime('-1 month')),
      'lastday' => date('Ymt', strtotime('-1 month')),
    ),
    array(
      'firstday' => date('Ym01', strtotime(date("Y-m-d"))),
      'lastday' => date('Ymd', strtotime((date('Ym01', strtotime(date("Y-m-d")))) . " +1 month -1 day")),
    ),
    array(
      'firstday' => date('Ymd', strtotime("-15 day")),
      'lastday' => date('Ymd', strtotime('-1 day')),
    ),
    array(
      'firstday' => date('Ymd', strtotime("-30 day")),
      'lastday' => date('Ymd', strtotime('-1 day')),
    ),
  );
  return is_null($type) ? $data : $data[$type-1];
}
print_r(getDateInfo(1));//获取上个月第一天与最后一天

Running results:

Array
(
  [firstday] => 20170601
  [lastday] => 20170630
)

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