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PHP:
скопировать код в буфер обмена

 
function datediff($interval=null, $dateto, $using_timestamps = false) {
  /*
    $interval can be:
    yyyy - Number of full years
    q - Number of full quarters
    m - Number of full months
    y - Difference between day numbers
      (eg 1st Jan 2004 is "1", the first day. 2nd Feb 2003 is "33". The datediff is "-32".)
    d - Number of full days
    w - Number of full weekdays
    ww - Number of full weeks
    h - Number of full hours
    n - Number of full minutes
    s - Number of full seconds (default)
  */
  
// select the timezone for your countdown
$timezone = trim($_GET['timezone']);
putenv("TZ=$timezone");
 
// Getting the current time
$datefrom = date("Y-m-d H:i:s"); // current time -- NO NEED TO CHANGE
    
  if (!$using_timestamps) {
    $datefrom = strtotime($datefrom, 0);
    $dateto = strtotime($dateto, 0);
  }
  $difference = $dateto - $datefrom; // Difference in seconds
 
  switch($interval) {
   
    case 'yyyy': // Number of full years
 
      $years_difference = floor($difference / 31536000);
      if (mktime(date("H", $datefrom), date("i", $datefrom), date("s", $datefrom), date("n", $datefrom), date("j", $datefrom), date("Y", $datefrom)+$years_difference) > $dateto) {
        $years_difference--;
      }
      if (mktime(date("H", $dateto), date("i", $dateto), date("s", $dateto), date("n", $dateto), date("j", $dateto), date("Y", $dateto)-($years_difference+1)) > $datefrom) {
        $years_difference++;
      }
      $datediff = $years_difference;
      break;
 
    case "q": // Number of full quarters
 
      $quarters_difference = floor($difference / 8035200);
      while (mktime(date("H", $datefrom), date("i", $datefrom), date("s", $datefrom), date("n", $datefrom)+($quarters_difference*3), date("j", $dateto), date("Y", $datefrom)) < $dateto) {
        $months_difference++;
      }
      $quarters_difference--;
      $datediff = $quarters_difference;
      break;
 
    case "m": // Number of full months
 
      $months_difference = floor($difference / 2678400);
      while (mktime(date("H", $datefrom), date("i", $datefrom), date("s", $datefrom), date("n", $datefrom)+($months_difference), date("j", $dateto), date("Y", $datefrom)) < $dateto) {
        $months_difference++;
      }
      $months_difference--;
      $datediff = $months_difference;
      break;
 
    case 'y': // Difference between day numbers
 
      $datediff = date("z", $dateto) - date("z", $datefrom);
      break;
 
    case "d": // Number of full days
 
      $datediff = floor($difference / 86400);
      break;
 
    case "w": // Number of full weekdays
 
      $days_difference = floor($difference / 86400);
      $weeks_difference = floor($days_difference / 7); // Complete weeks
      $first_day = date("w", $datefrom);
      $days_remainder = floor($days_difference % 7);
      $odd_days = $first_day + $days_remainder; // Do we have a Saturday or Sunday in the remainder?
      if ($odd_days > 7) { // Sunday
        $days_remainder--;
      }
      if ($odd_days > 6) { // Saturday
        $days_remainder--;
      }
      $datediff = ($weeks_difference * 5) + $days_remainder;
      break;
 
    case "ww": // Number of full weeks
 
      $datediff = floor($difference / 604800);
      break;
 
    case "h": // Number of full hours
 
      $datediff = floor($difference / 3600);
      break;
 
    case "n": // Number of full minutes
 
      $datediff = floor($difference / 60);
      break;
 
    default: // Number of full seconds (default)
 
      $datediff = $difference;
      break;
  }    
 
  return $datediff;
}
 

PHP:
скопировать код в буфер обмена

 
 
function secToDate($datediff, $null = true){
        $datediffD = 0;
        $datediffh = 0;
        $datediffi = 0;
        if($datediff >= 1440){
            $datediffD = floor($datediff/1440); //количество дней
            $datediffh = floor( ($datediff - ($datediffD * 1440)) /60 );
            $datediffi = ($datediff - ($datediffD * 1440)) % 60;
            
        }elseif($datediff<1440 and $datediff >=60 ){
            $datediffD = 0;
            $datediffh = floor( ($datediff - ($datediffD * 1440)) /60 );
            $datediffi = ($datediff - ($datediffD * 1440)) % 60;
        }elseif($datediff < 60 and $datediff >= 1 ){
            $datediffi = ($datediff - ($datediffD * 1440)) % 60;
        }
       if($null == true){
          
           //если показывать нулевые дни, часы и минуты
        $datediffText = $datediffD. ' дней ' .$datediffh. ' часов ' .$datediffi .' минут';
       }else{
          
           //НЕ ПОКАЗЫВАТЬ нулевые дни часы и минуты
           if($datediffD == '0'){
               
               if($datediffh == '0'){
                   $datediffText = $datediffi .' минуты';
               }else{
                   $datediffText = $datediffh. ' часа ' .$datediffi .' минут';
               }
           }else{
                 $datediffText = $datediffD. ' дней ' .$datediffh. ' часов ' .$datediffi .' минут';
           }
       }
        return $datediffText;
}
 