我试图从数据库中获取值，并在HTML表中显示'ref_id' em>的所有值。 当我使用echo命令标题时，显示但没有值提取并显示在窗体上：
<?php
include "header.php";
include "db.php";
$supplier = $_POST['ref_id'];
$query = "select farm from farms where id = $supplier";
$run = mysqli_query($con, $query);
while ($row = mysqli_fetch_array($run)) {
$url = $row['farm'];
}
$query1 = "select * from transactions where ref_id = $supplier";
$run1 = mysqli_query($con, $query1);
?>
<!DOCTYPE html>
<html lang="en" xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta charset="utf-8" />
<title></title>
<style>
table,
th,
td,
div {
border: 1px solid black;
border-collapse: collapse;
}
</style>
<div class="page-content">
<div class="row-fluid">
<div class="span12">
<table id="bill" style="width: 501px">
<tbody>
<tr>
<td colspan=3 align="center">Priv balances</td>
<td colspan=2 align="center">
</br<</td> <td colspan=2 align="center">(sale)</td>
</tr>
<tr rowspan=2>
<td rowspan=2 align="center">Date</td>
<td rowspan=2 align="center">Shift</td>
<td rowspan=2 colspan=2 align="center">
<table width=100%>
<tr>
<td colspan=100% align="center">
Particular
</td>
<tr>
<td colspan=70% align="center">
Mun(s)
</td>
<td colspan=30% align="center">
Kg(s)
</td>
</tr>
</tr>
</table>
</td>
<td rowspan=2 align="center">rate</td>
<td rowspan=2 colspan=2 align="center">Amount</td>
</tr>
</tbody>
<tbody>
<?php $numberofrow = 20;?>
<?php while ($row = mysqli_fetch_array($run1)) {
// Before we close out of PHP, lets define all of our variables so they are easier to remember and work with, // you can skip this though if you just want to directly reference each row. $date=$ row[
'datetime'];
$shift = $row['milk_type'];
$mann = $row['quantity'];
$kg = $row['kg'];
$amount = $row['total_amount']; // Now for each looped row echo "<tr><td>".$date. "</td><td>".$shift. "</td><td>".$mann. "</td> <td>".$kg.
"</td><td>" . $amount . "</td></tr>";} // End our while loop ?>
<?php// }?>
<tr colspan=7 rowspan=2>
<td align="left">Total Milk</td>
<td align="left"> </td>
<td align="right"> </td>
<td align="right"> </td>
<td align="right"> </td>
<td align="right"> </td>
</tr>
<tr colspan=7 rowspan=2>
<td align="left">Bandi</td>
<td align="left"> </td>
<td align="right"> </td>
<td align="right"> </td>
<td align="right"> </td>
<td align="right"> </td>
</tr>
</tbody>
<tbody>
<tr colspan=7>
<td colspan=2 rowspan=7>
<div>
<div id="span1">Date</div>
<div id="span2"> </div>
<div id="span2"> </div>
<div id="span2"> </div>
<div id="span2"> </div>
<div id="span2"> </div>
<div id="span2"> </div>
<div id="span2">Total</div>
</div>
</td>
<td colspan=2 rowspan=7>
<div>
<div id="span1">Payment</div>
<div id="span2"> </div>
<div id="span2"> </div>
<div id="span2"> </div>
<div id="span2"> </div>
<div id="span2"> </div>
<div id="span2"> </div>
<div id="span2">77000</div>
</div>
</td>
<td colspan=3 rowspan=8>
<table border="0" width=100%>
<tr>
<td>total amount</td>
<td>65550</td>
</tr>
<tr>
<td>Less Commision</td>
<td>
</br>
</td>
</tr>
<tr>
<td>Less Fare</td>
<td>
</br>
</td>
</tr>
<tr>
<td>Gross Bill</td>
<td>
</br>
</td>
</tr>
<tr>
<td>Add Priv Balance</td>
<td>
</br>
</td>
</tr>
<tr>
<td>
</br>
</td>
<td>
</br>
</td>
</tr>
<tr>
<td>Less Purchase Milk</td>
<td>
</br>
</td>
</tr>
<tr>
<td>Net Bill</td>
<td>
</br>
</td>
</tr>
</table>
</tr>
</tbody>
</table>
</div>
<!--/.span-->
</div>
<!--/.row-fluid-->
</div>
<!--/.page-content-->
</head>
</html>
<?php include "footer.php";?>
