Question

我有以下代码，它会计算经过的时间，并在用户点击停止按钮后以秒为单位打印该值。我们的第一个问题是我们试图让它以小时为单位发布经过的时间。因此，假设经过的时间是20分钟，输出将是.3小时。

其次，我们试图将此值发布到我们创建的MySQL数据库中的表中。它是我们表中的一个int值，只是不知道如何在那里发布它。任何帮助表示赞赏！

<script type="text/javascript">

// Javascript to compute elapsed time between "Start" and "Finish" button clicks
function timestamp_class(this_current_time, this_start_time, this_end_time, this_time_difference) { 
        this.this_current_time = this_current_time;
        this.this_start_time = this_start_time;
        this.this_end_time = this_end_time;
        this.this_time_difference = this_time_difference;
        this.GetCurrentTime = GetCurrentTime;
        this.StartTiming = StartTiming;
        this.EndTiming = EndTiming;
    }

    //Get current time from date timestamp
    function GetCurrentTime() {
    var my_current_timestamp;
        my_current_timestamp = new Date();              //stamp current date & time
        return my_current_timestamp.getTime();
        }

    //Stamp current time as start time and reset display textbox
    function StartTiming() {
        this.this_start_time = GetCurrentTime();        //stamp current time
        document.TimeDisplayForm.TimeDisplayBox.value = 0;      //init textbox display to zero
        }

    //Stamp current time as stop time, compute elapsed time difference and display in textbox
    function EndTiming() {
        this.this_end_time = GetCurrentTime();          //stamp current time
        this.this_time_difference = (this.this_end_time - this.this_start_time) / 1000; //compute elapsed time
        document.TimeDisplayForm.TimeDisplayBox.value = this.this_time_difference;      //set elapsed time in display box
        }

var time_object = new timestamp_class(0, 0, 0, 0);  //create new time object and initialize it

//-->
</script>

    <form>
        <input type="button" value="Start" onClick="time_object.StartTiming()"; name="StartButton">
    </form>
    <form>
        <input type="button" value="Finish" onClick="time_object.EndTiming()"; name="EndButton">
    </form>
    <form name="TimeDisplayForm">
    Elapsed time:
      <input type="text" name="TimeDisplayBox" size="6">
    seconds
    </form>

Answer 1

Date.getTime()以毫秒为单位返回时间，因此this_time_difference将具有以毫秒为单位的时间差。您需要做的就是除以36,00,000（1小时= 60分钟* 60秒* 1000毫秒）以获得以小时为单位的值。
```
var timeInHours = this_time_difference/3600000;
```
我不确定您将此数据（使用Ajax或plain old form submit）发布到将数据值插入数据库的PHP脚本时会出现什么问题 - 更多信息你被困的地方会帮助你得到更具体的答案。

从Javascript计时器到数据库的经过时间

1 个答案: