php减去当前时间保存在会话中的时间

Question

我正在使用 jquery 倒数计时器，但问题是计时器从每次刷新页面时设置的值开始。我想在第一次获得时间并保存在 PHP 会话中，并从第一次时间和更新会话中减去第二次。在简单的 Word 中，我想创建 php 倒数计时器，使用 php 仅运行 50

这是我的控制器代码

public function actionViewtimer($id) {
    $session = Yii::app()->session;
    $this->layout = 'countdownlayout';
    if (empty($session['countdowntime'])) {
        $orderTime = microtime(true); #when user first time enter timer start from 50 mins
        $session->add('countdowntime', array($orderTime));   //replace this line
    } else {
        $time_end = microtime(true);
        $orderTime = $time_end - $time_start;
        unset($session['countdowntime']);//unset old session
        $session->add('countdowntime', array($orderTime));   //when user enter second  
    }

    $getMinutes = $getMinutes_from_orderTime ; #please tell me how  we extact minutes and pass them to view

    $session->add('timersession', array($rand));   
    $this->render('viewtimerpage', array(
        'getMinutes' => $getMinutes
    ));
}

这是我的 jquery 代码

 <script>
 $(function() {
     $('#xlarge').countdowntimer({
          minutes: 50<?php echo $getMinutes; ?>,
          size: "lg",
          timeUp: timeisUp
     });
 });

 function timeisUp() {
     alert('Time Complete');
     return false;
 }
 </script>

Answer 1

对不起，我没有用过 Yii，所以这个例子是纯 PHP 的。

session_start();

if(!isset($_POST['counter']) || !is_array($_POST['counter')) {
    $duration = 50;
    $counter = array(
        'start_time' => new DateTime()->format('Y-m-d H:i:s'),
        'end_time' => new DateTime()->modify("+{$duration} minute")->format('Y-m-d H:i:s'),
        'duration' => $duration
    );

    $_SESSION['counter'] = $counter;
}
$counter = $_POST['counter'];

$now = new DateTime();
$end_time = new DateTime($counter['end_time']);
$time_left = $end_time->getTimestamp() - $now->getTimestamp();

echo "{$time_left} seconds left";

这应该很容易转换，您可以轻松地将秒转换为分钟。

Answer 2

不要破坏会话变量。只需在第一次为空时设置它，然后始终将该值插入倒数计时器。

内在行动

$session = Yii::app()->session;
$this->layout = 'countdownlayout';
if (empty($session['countdowntime'])) {
    $date = new DateTime();
    $date->modify('+50 minutes'); // Add 50 minutes to current time
    $session['countdowntime'] = $date->format('Y/m/d H:i:s'); // Store date in session
} 
$this->render('viewtimerpage', array(
    'countdowntime' => $session['countdowntime'];
));

jQuery 代码

$(function() {
    $('#xlarge').countdowntimer({
        dateAndTime : "<?php echo $countdowntime; ?>",
        size: "lg",
        timeUp: timeisUp
    });
});

Answer 3

据我了解，您想显示两个日期之间的差异。默认值 = 50 分钟（用户第一次打开页面时的会话值）。如果用户在查看 10 分钟后刷新页面必须显示差异（40）。会是这样的：

public function actionViewtimer($id) {
        $this->layout = 'countdownlayout';
        /** @var CHttpSession $session */
        $session = Yii::app()->session;
        $minutes = 50; //default value for minutes

        if (!$session->offsetExists('countdowntime')) {
            $session->add('countdowntime', new DateTime()); //set value to session
        } else {
            $timeEnd = new DateTime();
            /** @var DateTime $countDownTime */
            $countDownTime = $session->get('countdowntime');
            $interval = $countDownTime->diff($timeEnd);
            $countMinutes = $interval->days * 24 * 60;

            $countMinutes += $interval->h * 60;
            $countMinutes += $interval->i;
            $minutes -= $countMinutes;

            $session->add('countdowntime', $timeEnd);   //refresh value
        }

//        $session->add('timersession', array($rand)); don't know for what is it
        $this->render('viewtimerpage', array(
            'getMinutes' => $minutes
        ));
}

还有js：

<script>
 $(function() {
     $('#xlarge').countdowntimer({
          minutes: <?php echo $getMinutes; ?>, //without 50