我正在尝试制作一个倒计时计时器，从当前时间倒计时到未来的设定时间。我只使用 JS 就可以完美地工作，但我需要使用服务器的当前时间而不是客户端。
我尝试过使用 PHP 来获取服务器纪元时间，然后我想每秒递增一次并转换为 Javascript Date 对象，以便我可以进行比较并将剩余时间写入 DOM。我不知道这是否可能，甚至是最好的方法，但目前它不会增加或从服务器提供有效/正确的日期。
<!DOCTYPE html>
<?php
$end_time = $_GET['time'];
$server_epoch = $_SERVER['REQUEST_TIME'];
?>
<html>
<head>
<script type="text/javascript">
var counter = setInterval(function(){
countdown(<?= $server_epoch ?>, "<?= $end_time?>");
server_e++;
}, 1000);
/*
* Calculates the time remaining to the nearest second from the current time until the
* end time and updates DOM elements with id of "time" to display the formatted time(D,H,M,S)
*/
function countdown(server, end_time){
var current_time = new Date(server);
var end = new Date(end_time);
var time_left = (end - current_time) / 1000;
if(time_left <= 0){
document.getElementById("time").innerHTML= "Auction has ended" ;
} else {
var days = Math.floor(time_left / 86400);
var hours = Math.floor(((time_left / 86400)-days) * 24);
var mins = Math.floor(((((time_left / 86400)-days) * 24)-hours)* 60);
var secs = Math.floor(((((((time_left / 86400)-days) * 24)-hours)* 60)-mins) * 60);
var day_string = " days, ";
if (days == 1){
day_string = " day, "
}
document.getElementById("time").innerHTML= days + day_string + hours +" hours, " + mins +" mins, "+ secs+" secs" ;
document.getElementById("current").innerHTML= current_time ;
document.getElementById("ends").innerHTML= end ;
}
}
</script>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title></title>
</head>
<body>
<div id="time_box">
<form method="get" action="index.php">
<input type="text" name="time"/>
<input type="submit" value="submit">
</form>
php time: <?= $server_epoch; ?><br/>
Current time: <div id="current"></div> <br/>
Ends: <div id="ends"></div><br/>
Time left: <div id="time"></div>
</div>
</body>
</html>