如何在索引上仅显示1行

Question

I am using Arduino, ESP8266 to send data sensor to localhost. 我正在使用Arduino，ESP8266将数据传感器发送到localhost。 See image below, I don't know to to make at the index.php only show 1 latest data only on 1 row like the rectangle with red color in the image. 参见下图，我不知道要在index.php上仅在1行上显示1个最新数据，例如图中带有红色矩形的矩形。

<?php

    include("dbcon.php");   

    $link=$cn;
    $i=0;
    $result=mysqli_query($link,"SELECT * FROM `node` where 1");

?>

<html>
   <head>
      <title>Sensor Data1</title>
      <meta http-equiv="refresh" content="30">  
   </head>
<body>
   <Center><h1>Sensor Readings</h1>

   <table border="1" cellspacing="1" cellpadding="1">
        <tr>
            <td>&nbsp;No&nbsp;</td>
            <td>&nbsp;Waktu / Tarikh&nbsp;</td>
            <td>&nbsp;Temperature &nbsp;</td>
            <td>&nbsp;Humidity &nbsp;</td>
            <td>&nbsp;Length(CM)&nbsp;</td>
            <td>&nbsp;Node&nbsp;</td>   
        </tr>


      <?php 
             while($row = mysqli_fetch_array($result)) {
                printf("<tr><td> &nbsp;%d </td><td> &nbsp;%s&nbsp; </td><td> &nbsp;%s&nbsp; </td><td> &nbsp;%s&nbsp; </td><td> &nbsp;%s&nbsp; </td><td> &nbsp;%s&nbsp; </td></tr>", 
                   ++$i, $row["tarikh"], $row["temperature"], $row["humidity"], $row["height"], $row["node"]);
             }      

      ?>
<script type="text/javascript">
document.write ('<p>Waktu sekarang: <span id="date-time">', new Date().toLocaleString(), '<\/span>.<\/p>')
if (document.getElementById) onload = function () {
    setInterval ("document.getElementById ('date-time').firstChild.data = new Date().toLocaleString()", 50)
}
</script>
   </table></center>
</body>
</html>

Answer 1

From the attached image it looks like you want to limit the output to a single row , not a single column . 从所附的图像，它看起来像你想的输出限制为单行，而不是单个列。 You could do this using a combination of the order by and limit clauses: 您可以结合使用order by和limit子句来做到这一点：

SELECT * FROM `node` ORDER BY `waktu` DESC LIMIT 1

如何在索引上仅显示1行

问题描述

1 个解决方案

解决方案1
1 2016-03-31 09:46:22

如何在索引上仅显示1行

问题描述

1 个解决方案

解决方案1 1 2016-03-31 09:46:22

解决方案1
1 2016-03-31 09:46:22