foreach遍历输出数据表

<?php include "link.php"; ?>

    <form method="post">

        <p>id:<input type="text" name="id"/></p>

        <p>length:<input type="text" name="length"</p>

        <p>width:<input type="text" name="width"</p>

        <p>height:<input type="text" name="height"</p>

        <br>;

        <input type="submit" value="UPDATE"/>

    </form>

<?php

$con = mysqli_connect("localhost", "root", "CWT520", "jiaju");

if (!$con) {

    die('Could not connect:' . mysql_error());

}

if (isset($_POST['id']))

    mysqli_query($con, "UPDATE jiajudata SET ID='" . $_POST['id'] . "'

    where id='" . $_POST['id'] . "'");

if (isset($_POST['length']))

    mysqli_query($con, "UPDATE jiajudata SET length='" . $_POST['length'] . "'

    where id='" . $_POST['id'] . "'");

if (isset($_POST['width']))

    mysqli_query($con, "UPDATE jiajudata SET width='" . $_POST['width'] . "'

    where id='" . $_POST['id'] . "'");

if (isset($_POST['height']))

    mysqli_query($con, "UPDATE jiajudata SET height='" . $_POST['height'] . "'

    where id='" . $_POST['id'] . "'");

function render_table($result)

{

    echo "<table border=1>";

    echo "<tr>";

    $row = mysqli_fetch_array($result, MYSQLI_ASSOC);

    foreach ($row as $key => $link) {

        echo "<td>" . $key . "</td>";

    }

    echo "</tr>";

    foreach ($row as $key => $link){

    echo "<td>".  $link. "</td>";

    }

    while ($row222 = mysqli_fetch_array($result,MYSQLI_ASSOC)) {

        echo "<tr>";

        foreach ($row222 as $key => $link1) {

            echo "<td>" . $link1 . "</td>";

        }

        echo "</tr>\n";

    }

}

echo "</table>";

$result = mysqli_query($con, "SELECT * FROM jiajudata");

render_table($result);

mysqli_close($con);

?>