I have a vertical menu bar that has categories and these categories have products under them. The URL seen when I hover over the category is `..../index.php?catid=1`

For instance I have

```
category- SCHOOLS (catid=1)
products - NPS, DPS...

```

In order to display the products, I need to use *$\_GET* to get the 'catid' from the URL when I hover over the product.

This is the code for that part:

```
$fetchedcatid = $_GET['catid'];
$resultLIst = array();
$i = 0;
$sql="Select * from product_master where id = ".$fetchedcatid;
$query=mysql_query($sql) or die(mysql_error());

```

This gives me a MYSQL error since the catid is not stored in $fetchedcatid. 

Please help. Thanks.