PHP日期范围没有年份。 如何处理12月/ 1月环回[关闭]

Question

I have user defined date ranges. A date range might be from November 8 - March 26 for example. I need to determine if a given date (without the year) is between one of these ranges. I don't want to include the year because the user defined date ranges are recursive for each year.

My problems is that I don't know how to handle the loop-back between December 31 and Jan 1. I'm guessing that a PHP DatePeriod object would be the way to go but how can I exclude the year from it? If I have a date range from December 10 to February 15 how can I determine if Jan 11 is in that range without specifying the year?

Answer 1

If you are really not dealing with years, then making one up (as per binnyb's answer) is the way to go. The trick is adding the logic to test if the start date is after the end date - indicating that they are from different years.

An example solution (based on the answer to a similar question with years):

// For convenience, build MM-DD strings
$date1 = "11-8";
$date2 = "03-26";
$test = "01-15";

if (check_in_range($date1, $date2, $test)) echo "in range!";

function check_in_range($start_date, $end_date, $test_date)
{
    $year = '2000';

    $start_ts = strtotime($year.'-'.$start_date);
    $end_ts = strtotime($year.'-'.$end_date);
    $test_ts = strtotime($year.'-'.$test_date);

    if ($start_ts > $end_ts) {
      $year -= 1;
      $start_ts = strtotime($year.'-'.$start_date);
    }

    return (($test_ts >= $start_ts) && ($test_ts <= $end_ts));
}