PHP会在一周内检查两个日期以进行倒计时

Question

I have two events on two days each week. Both starting on 13:15 at each day. Each tuesday and each thursday. I need to check if the nearest event (from now()) is tuesday (till 13:15) OR thursday (till 13:15) to set the javascript countdown correctly (it will get the date("Y-m-d H:i:s") string for counting)

PSEUDO EXAMPLE:

if( tuesday("13:15") == 'over' &&  thursday("13:15") == 'remaining' ) {
  echo 'Next event start thursday 13:15'; 
  // need time format here for the thursday
} else {
  echo 'Next event start tuesday 13:15'; 
  // need time format here for the tuesday
}

I'm struggling with comparing the time ranges:

$now = new DateTime(date("Y-m-d"));

$event_time = '13:15';
$event_tuesday = new DateTime("next tuesday");
$event_thursday = new DateTime("next thursday");

echo $diff_tuesday = $event_tuesday->diff($now)->format("%a");
echo $diff_thursday = $event_thursday->diff($now)->format("%a");

But i think that's anyway wrong. Can somebody give me a hint?

Answer 1

You can use the power of PHP's strtotime which understands strings like next Tuesday, next month + 1 day, etc.

Please see comments in the following code snippet.

Please also note that you must set the default timezone as appropriate.

// Current instant:
$now = time();

// 13:15 of today's day if it's Tuesday (regardless of the current time), 
// otherwise the next upcoming Tuesday:
$thisTuesday1315 = strtotime("this Tuesday 13:15");

// 13:15 of today's day if it's Thursday (regardless of the current time), 
// otherwise the next upcoming Thursday:
$thisThursday1315 = strtotime("this Thursday 13:15");

if($thisTuesday1315 <= $now || ($now < $thisThursday1315 && $thisThursday1315 < $thisTuesday1315)) {
    echo 'Next event start: Thursday 13:15';
    // You may use the `$thisThursday1315` timestamp here
} else {
    echo 'Next event start: Tuesday 13:15';
    // You may use the `$thisTuesday1315` timestamp here
}