php - Check if timeranges overlap -


i need check whether entered time range overlaps time range thread php function check time between given range? gives simple explanation on how check if 1 date range

i altered second example function/if-case following:

    if(check_slot_range('2014-06-26 06:00:00','2014-06-26 10:00:00', '2014-06-26 07:00:00') or check_slot_range('2014-06-26 06:00:00','2014-06-26 10:00:00', '2014-06-26 09:00:00')){       echo "overlap";     }else{       echo "no overlap";     }

only following give overlap:

  • range '2014-06-26 07:00:00' '2014-06-26 09:00:00'

  • range '2014-06-26 05:00:00' '2014-06-26 09:00:00'

  • range '2014-06-26 07:00:00' '2014-06-26 11:00:00'

this 1 not throw overlap:

  • range '2014-06-26 05:00:00' '2014-06-26 11:00:00'

how need change if-clause catch overlap last example?

for clarification, here function compare

    function check_slot_range($start_date, $end_date, $todays_date) {    $start_timestamp = strtotime($start_date);   $end_timestamp = strtotime($end_date);   $today_timestamp = strtotime($todays_date);    return (($today_timestamp >= $start_timestamp) && ($today_timestamp <= $end_timestamp));   }

to check overlap, check if low1 <= high2 , high1 >= low2 (instead of date >= low , date <= high in example above)

you can create new function checks condition this:

function check_ranges_overlap($start_date_1, $end_date_1, $start_date_2, $end_date_2) {     $start_timestamp_1 = strtotime($start_date_1);     $end_timestamp_1 = strtotime($end_date_1);     $start_timestamp_2 = strtotime($start_date_2);     $end_timestamp_2 = strtotime($end_date_2);      return (($start_timestamp_1 <= $end_timestamp_2) && ($end_timestamp_1 >= $start_timestamp_2)); }

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