no ?id= show something else

[Limit]

Hi i'm using PHP and currently my code does this:-

gets the id and displays the article i.e articles.php?id=4

how can i get is so that if articles.php is entered instead of saying no article it will show the categories. I have the categories mostly done already but on a different page.

[Sketch]

if($_GET['id'] == '')
{
    include"categories.php"
}
else
{
    include"article4.php"
}

I'm not sure if thats what you mean but something like that would work if ID isn't entered.

[Limit]

k instead of that would it be possible to use one file like this:-

articles.php runs the query to the DB to show all the categories (if no id is present do the category query)

and

articles.php?id=2 runs a separate query to get the article (if id is present do the article find query)

[adrenalinepcs]

PHP Code:

if($_GET['id'])
{
   article query
}
else
{
    include("categories.php");
} 


[Limit]

k does it have to have categories.php as i'm hoping to delete that file and use just articles.php.

[hatchet]

Just have 2 functions.. one for listing articles and one for categories.. then do as adrenaline said - except change article query to article($id); where article is the function name... and change include('categories.php'); to categories(); where categories is the function name.

[Limit]

k but there is no categories anymore.

is it possible to have 1 file called articles.php and when there is the ?id= present it will look for the article with that id and when there is no ?id= present it will display the catergories using my sql query not an include.

ie:

IF id is present {
find article with that id
}
else {
category sql query
}

[adrenalinepcs]

post all your current queries and i'll write a the file for you.

[hatchet]

Limit - that's exactly what adrenalinepcs code does.

If id is set then show article with id else show categories.

[Limit]

k thanxs i have now done that. I got confused earlier. Anyway i modified it to this:-

if(@(int) $_GET['id'])

the @ stopped the error about undefined index and the int makes sure only numbers can be entered, so no ' " i think.