如何偏移HTML表格用PHP从不同列的第二行单元格值减去第1行的单元格值

问题描述 投票:0回答:1

好了,我试图解决从上周这个问题,并没有找到一个解决办法我问的问题这么多次,但没能得到的代码工作,所以我把所有的细节在这一个问题。

我生成PHP与MySQL查询的HTML表(表看起来像这样Table

DB ID   EmpID   Date        Username    Computername    State   Minutesatstate  Statestarttime  Stateendtime        Timestamp
704634  303836  02-06-2019  user        PC-818          Idle    2               13:44           13:46               2019-02-06 13:46:46
704599  303836  02-06-2019  user        PC-818          Active  16              13:28           13:44               2019-02-06 13:44:46
704340  303836  02-06-2019  user        NIPL-1220       Active  2               13:27           13:28               2019-02-06 13:28:48
704313  303836  02-06-2019  user        PC-818          Active  13              13:15           13:27               2019-02-06 13:27:31

我想补充的PHP或jQuery的或JavaScript的另一列减去Statestarttime第一排与第二排的Stateendtime列的列找出时间差。

我只是想显示在页面上最小差异列。

例如预期的结果

StateStarTtime    StateEndTime   Min Difference 

03:57             03:58          00:03
03:53             03:54          00:04
03:46             03:49          null

我能找到这么多例子,帮助第一行从StateEndTime减去StateStarTtime,但我想减去StateEndTime的第二行单元格值StateStarTtime的第1行单元格值找到分差。

我在HTML和PHP初学者,但完全新的JS / JQ等我怎么能做到这一点的任何方向是非常赞赏。下面是PHP和HTML代码片断我使用。让我知道如果你想要完整的代码。

从MySQL中获取数据

<?php

if(isset($_POST['search']))
{
    $valueToSearch = $_POST['valueToSearch'];
    $query = "SELECT * FROM time WHERE DATE_SUB(CURDATE(),INTERVAL 7 DAY) <= Timestamp AND EmpID='".$valueToSearch."' ORDER BY `time`.`Timestamp` DESC";
    $search_result = filterTable($query);

}
 else {
    $query = "SELECT * FROM time WHERE DATE_SUB(CURDATE(),INTERVAL 1 DAY) <= Timestamp ORDER BY `time`.`Timestamp` DESC";
    $search_result = filterTable($query);
}

function filterTable($query)
{
    $connect = mysqli_connect("localhost", "root", "", "timetracker");
    $filter_Result = mysqli_query($connect, $query);
    return $filter_Result;
}

?>

表PHP代码

            <?php while($row = mysqli_fetch_array($search_result)):?>

            <tr>
                <td align="Center"><?php echo $row['id'];?></td>
                <td align="Center"><?php echo $row['EmpID'];?></td>
                <td align="Center"><?php echo $row['Date'];?></td>
                <td align="Center"><?php echo $row['Username'];?></td>
                <td align="Center"><?php echo $row['Computername'];?></td>
                <td align="Center"><?php echo $row['State'];?></td>
                <td align="Center"><?php echo $row['MinutesatState'];?></td>
                <td align="Center"><?php echo $row['StateStarttime'];?></td>
                <td align="Center"><?php echo $row['StateEndtime'];?></td>
                <td align="Center"><?php echo $row['Timestamp'];?></td>


            </tr>
            <?php endwhile;?>

试图解决方案 - 1

<?php while($row = mysqli_fetch_array($search_result)):?>
    <?php $startTime[] =  $row['StateStarttime'];?>
    <?php $endTime[] = $row['StateEndtime'];?>
<?php endwhile;?>
<?php 
    $i = 0;
    while($row = mysqli_fetch_array($search_result)):?>
        <tr>
            <td align="Center"><?php echo $row['id'];?></td>
            <td align="Center"><?php echo $row['EmpID'];?></td>
            <td align="Center"><?php echo $row['Date'];?></td>
            <td align="Center"><?php echo $row['Username'];?></td>
            <td align="Center"><?php echo $row['Computername'];?></td>
            <td align="Center"><?php echo $row['State'];?></td>
            <td align="Center"><?php echo $row['MinutesatState'];?></td>
            <td align="Center"><?php echo $row['StateStarttime'];?></td>
            <td align="Center"><?php echo $row['StateEndtime'];?></td>
            <td align="Center"><?php echo $row['Timestamp'];?></td>
            //your calculation goes here like diff



            <td align="Center">
               <?php 
                   $mycalc = ($startTime[$i] - $endTime[$i+1]);   
                    echo $mycalc;
                ?>
            </td>
        </tr>
        $i++;
<?php endwhile;?>

试图解决方案 - 2

<?php for($i = 0; $i < count($results); $i++): ?>
    <?php
    $datetime1 = DateTime::createFromFormat('i:s', $results[$i]['StateStarttime']);
    $datetime2 = DateTime::createFromFormat('i:s', $results[$i+1]['StateEndtime']);

    if($datetime2)
        $interval = $datetime1->diff($datetime2)->format('%I:%S');
    else
        $interval = 'unknown';

    ?>
    <tr>
        <td align="Center"><?php echo $results[$i]['id'];?></td>
        <td align="Center"><?php echo $results[$i]['EmpID'];?></td>
        <td align="Center"><?php echo $results[$i]['Date'];?></td>
        <td align="Center"><?php echo $results[$i]['Username'];?></td>
        <td align="Center"><?php echo $results[$i]['Computername'];?></td>
        <td align="Center"><?php echo $results[$i]['State'];?></td>
        <td align="Center"><?php echo $results[$i]['MinutesatState'];?></td>
        <td align="Center"><?php echo $results[$i]['StateStarttime']; ?></td>
        <td align="Center"><?php echo $results[$i]['StateEndtime']; ?></td>
        <td align="Center"><?php echo $results[$i]['Timestamp'];?></td>
        <td align="Center"><?php echo $interval; ?></td>

    </tr>
<?php endfor; ?>

之前,任何人都建议我这个

<td align="Center"><?php echo($row['StateEndtime'] - $row['StateStarTtime ']) ?></td>

这会给我StateStarTtimeStateEndtime的微小差别在同一行,我想减去StateStarTtime的第二行单元格值StateEndTime的第一行单元格值等找到分差英寸

javascript php jquery mysql html5
1个回答
2
投票

尝试沿着此线的东西。只是指导,真正实行由你。此外,我会建议你使用{}而非endwhile

   <?php 
    $last_row = $mysqli_fetch_array($search_result));
    while($row = mysqli_fetch_array($search_result)){
    //this is pseudocode, you will need to convert to date objects
    $timediff = $last_row['StateStarttime'] - $row['StateEndtime'];
    ?>
        <tr>
            <td align="Center"><?php echo $row['id'];?></td>
            <td align="Center"><?php echo $row['EmpID'];?></td>
            <td align="Center"><?php echo $row['Date'];?></td>
            <td align="Center"><?php echo $row['Username'];?></td>
            <td align="Center"><?php echo $row['Computername'];?></td>
            <td align="Center"><?php echo $row['State'];?></td>
            <td align="Center"><?php echo $row['MinutesatState'];?></td>
            <td align="Center"><?php echo $row['StateStarttime'];?></td>
            <td align="Center"><?php echo $row['StateEndtime'];?></td>
            <td align="Center"><?php echo $row['Timestamp'];?></td>
            // echo $timediff
        </tr>
        <?php
        $last_row = $row;
    }?>
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