PHP Date Time Function

Here's useful function that calculates the difference between two dates. You can get the result in seconds, minutes, hours, days, weeks, and year. :)

dateDiff() function

//function like dateDiff Microsoft
//not error in year Bissesto
function dateDiff($interval,$dateTimeBegin,$dateTimeEnd) {
    //Parse about any English textual datetime
    //$dateTimeBegin, $dateTimeEnd
    $dateTimeBegin=strtotime($dateTimeBegin);
    if($dateTimeBegin === -1) {
      return("..begin date Invalid");
    }
    
    $dateTimeEnd=strtotime($dateTimeEnd);
    if($dateTimeEnd === -1) {
      return("..end date Invalid");
    }
    
    $dif=$dateTimeEnd - $dateTimeBegin;
    switch($interval) {
      case "s"://seconds
          return($dif);
      case "n"://minutes
          return(floor($dif/60)); //60s=1m
      case "h"://hours
          return(floor($dif/3600)); //3600s=1h
      case "d"://days
          return(floor($dif/86400)); //86400s=1d
      case "ww"://Week
          return(floor($dif/604800)); //604800s=1week=1semana
      case "m": //similar result "m" dateDiff Microsoft
          $monthBegin=(date("Y",$dateTimeBegin)*12)+
            date("n",$dateTimeBegin);
          $monthEnd=(date("Y",$dateTimeEnd)*12)+
            date("n",$dateTimeEnd);
          $monthDiff=$monthEnd-$monthBegin;
          return($monthDiff);
      case "yyyy": //similar result "yyyy" dateDiff Microsoft
          return(date("Y",$dateTimeEnd) - date("Y",$dateTimeBegin));
      default:
          return(floor($dif/86400)); //86400s=1d
    }
}

Usage

// Get DateTime difference in seconds
$seconds = dateDiff('s', $dateTimeBefore, $dateTimeNow);
echo $seconds;

// Get DateTime difference in minutes
$minutes = dateDiff('n', $dateTimeBefore, $dateTimeNow);
echo $minutes;

// Get DateTime difference in hours
$hours = dateDiff('h', $dateTimeBefore, $dateTimeNow);
echo $hours;

// Get DateTime difference in days
$days = dateDiff('d', $dateTimeBefore, $dateTimeNow);
echo $days;

// Get DateTime difference in Week
$Week = dateDiff('ww', $dateTimeBefore, $dateTimeNow);
echo $Week;

// Get DateTime difference in similar result "m" dateDiff Microsoft
$m = dateDiff('m', $dateTimeBefore, $dateTimeNow);
echo $m;

// Get DateTime difference in similar result "yyyy" dateDiff Microsoft
$yyyy = dateDiff('yyyy', $dateTimeBefore, $dateTimeNow);
echo $yyyy;

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