Обратный отсчет

 
	$sec = strtotime($item['date_approved']) - time();
 

 
function getTimeRemaining(endtime) {
  var t = Date.parse(endtime) - Date.parse(new Date());
  var seconds = Math.floor((t / 1000) % 60);
  var minutes = Math.floor((t / 1000 / 60) % 60);
  var hours = Math.floor((t / (1000 * 60 * 60)) % 24);
  var days = Math.floor(t / (1000 * 60 * 60 * 24));
  return {
    'total': t,
    'days': days,
    'hours': hours,
    'minutes': minutes,
    'seconds': seconds
  };
}
 
function initializeClock(id, endtime) {
  var clock = document.getElementById(id);
  var daysSpan = clock.querySelector('.days');
  var hoursSpan = clock.querySelector('.hours');
  var minutesSpan = clock.querySelector('.minutes');
  var secondsSpan = clock.querySelector('.seconds');
 
  function updateClock() {
    var t = getTimeRemaining(endtime);
 
    daysSpan.innerHTML = t.days;
    hoursSpan.innerHTML = ('0' + t.hours).slice(-2);
    minutesSpan.innerHTML = ('0' + t.minutes).slice(-2);
    secondsSpan.innerHTML = ('0' + t.seconds).slice(-2);
 
    if (t.total <= 0) {
		document.getElementById("countdown").className = "d-none";
		document.getElementById("deadline-message").className = "d-block";	
		clearInterval(timeinterval);
    }
  }
 
  updateClock();
  var timeinterval = setInterval(updateClock, 1000);
  setInterval(progress, 1000 );
}
var deadline = new Date(Date.parse(new Date()) +<?php echo $sec ; ?> *1000 );
 
initializeClock('countdown', deadline);
 

<div id="countdown" class="countdown">
<div class="countdown-number"><span class="days countdown-time"></span></div>
<div class="countdown-number"><span class="hours countdown-time"></span>:</div>
<div class="countdown-number"><span class="minutes countdown-time"></span>:</div>
<div class="countdown-number"><span class="seconds countdown-time"></span></div>
</div>