如何调试此代码给出错误的原因？

Still wondering why its not working.

echo "<a  href="&quot;$config_basedir. &quot;/products.php?id=&quot; . $catrow[">". $catrow['name'] . "</a>";}

I wanted to use a variable for the products.php?id=&quot.. Is there another way to solve this?

Use this...

$catrow_name = $catrow['name'];
$config_basedir = $config_basedir."/products.php?id=$catrow_name";
echo '<a  href="'.$config_basedir.'">'.$catrow['name'].'</a>';

</div>

There is some issue in using quote in your code, please see the below code:

echo '<a href="'.$config_basedir.'/products.php?id='.$catrow['name'].'">'.$catrow['name'].'</a>';

You can get value of id from URL as: $id = $_GET["id"];

You really don't need the " . I think there is also a curly brace at the end of your which is also a possible problem. Kindly post the error php throws in your browser for more clarification