Passing multiple ID's in URL variable

Question

How can I show results from a mysql database from selected ID's using URL variables?
Showing results from one ID works fine:
mypage.php?id=1
But,
My table has 10 rows and I want to show 3 of those rows:
mypage.php?id=1&id=3&id=4
Thanks for a point in the right direction.

Answer 1

Are any of you original participants in this thread still around? I'm a bit of a "Jack of all trades, master of none" and I'm having a hell of time. I'm pretty sure this post relates to what I'm trying to do, but I'm just starting in dynamic site building with PHP and I can't seem to translate this situation into my situation.
What I'm trying to do is set up a series of menu items for categories of merchandise (rugs), with subcategories for size. I've succeeded in making links where the user can choose ALL sizes within a category and (separately) I've succeeded in making links where the user can choose a size within a specific category, but I'm not able to create links where the user can choose a specific size OR see all sizes out of a single menu.
Here's what I've got:
3 tables: products, categories & size
The size table has 2 columns - sizeName, and SizeID - the sizeID column is an integer and it links to products table.
The categories table also has 2 columns - categoryName and categoryID - the categoryID column is also an integer which links with the product table
I also built a menu with categories, and each category has a drop down menu where the viewer can choose a size.
Each size link has a parameter which includes the categoryID as well (in following example, all the sizes are within one category):
small - products.php?categoryID=8&sizeID=1
medium - products.php?categoryID=8&sizeID=2
large - products.php?categoryID=8&sizeID=3
On the receiving page (products.php) I created a recordset which looks like this (I'm looking at the recordset dialog box within Dreamweaver CS4):
SELECT price, `description`, categoryID, largeImage, smallImage, sizeID
FROM products
WHERE categoryID = colname AND sizeID = varSize
ORDER BY price ASC
the variables look like this:
Name: colname
type: Integer
default value: -1
Runtime value: $_GET['categoryID'}
Name: varSize
Type: Integer
Default value: 1
Runtime value: $_GET['sizeID']
(Dreamweaver created colname and I created varSize. I'm not really sure why the default values are as they are).
This works, but it doesn't give the "all sizes" option. So I've tried applying what I saw in the thread, by creating this link instead:
products.php?categoryID=8&sizeID=1&sizeID=2&sizeID=3
In the recordset I created the new variables like this (all as integers with 1 as default value):
varSmall = $_GET['sizeID_1']
varMedium = $_GET['sizeID_2']
varLarge = $_GET['sizeID_3']
And I wrote this code:
SELECT price, `description`, categoryID, largeImage, smallImage, sizeID
FROM products
WHERE categoryID = colname AND sizeID = varSize
OR
WHERE categoryID = colname AND sizeID = varSmall AND sizeID = varMedium AND sizeID = varLarge
But within the recordset dialog box, I hit the test button and I got a message about a syntax error.
Am I anywhere near the solution? Any help would be greatly appreciated.
Thanks,
Dave