从SQL数据添加echo'dHT的链接

Question

Back with another quick question. I have this code below which echo's out product names from a database. What I want to do is make the echoed out product names a link to another page called product.php, each link needs to have a unique ID, for example

<a href="product.php?id=1">Product Name</a> 

How would I go about doing this? Many thanks. I will point out that I am very new to PHP.

<?php
//create an ADO connection and open the database
$conn = new COM("ADODB.Connection");
$conn->open("PROVIDER=Microsoft.Jet.OLEDB.4.0;Data Source=C:\WebData\Northwind.mdb");

//execute an SQL statement and return a recordset
$rs = $conn->execute("SELECT product_name FROM Products");
$num_columns = $rs->Fields->Count();

echo "<table border='1'>"; 
echo "<tr><th>Name</th></tr>";
while (!$rs->EOF) //looping through the recordset (until End Of File)
{
     echo "<tr>";
     for ($i=0; $i <  $num_columns; $i++) {
         echo "<td>" . $rs->Fields($i)->value . "</td>";
     }
     echo "</tr>";
     $rs->MoveNext();
}
echo "</table>";

//close the recordset and the database connection
$rs->close();
$rs = null;
$conn->close();
$conn = null;
?>

Answer 1

Assuming your Products table has a unique ID field called "id", change your select to:

$rs = $conn->execute("SELECT id, product_name FROM Products");

And when you want to create a link, use that field and pass it into the URL. So you'd have product.php?id=<?= $thatIdField; ?>.

Example code:

echo "<table border='1'>"; 
echo "<tr><th>Name</th></tr>";
while (!$rs->EOF) //looping through the recordset (until End Of File)
{
     echo "<tr>";
     for ($i=0; $i <  $num_columns; $i++) {
         echo "<td><a href=\"product.php?id=" . $rs->Fields('id').value . "\">" . $rs->Fields($i)->value . "</a></td>";
     }
     echo "</tr>";
     $rs->MoveNext();
}
echo "</table>";