$_GET issue

[kapz22]

Hi all, i need some help.

 

basiclly i am making a view page which has a an id in the URL i.e view.php?id=1

if no id is included in the url, it errors.  I fixed that by inserting the following code:

 

if (!isset($_GET["id"])){

$_GET["id"] = "";

}

 

but it still loads the page and has errors.

 

how do i need to change this code so that if ?id= is not in the url, it doesnt load the page? i.e. takes the user to the prvious page they were at.

[premiso]

if (!isset($_GET['id'])) {
    echo "The page you are viewing requires a valid ID to be passed. None given.";
    exit;
}

 

Would be one way, not the neatest but would work.

[kapz22]

im sure it can be done though, as i have seen it on websites, where if the url is not correct ie not containing the variables, it wont load the page at all.

 

 

[kapz22]

can this be done another way?

[premiso]

im sure it can be done though, as i have seen it on websites, where if the url is not correct ie not containing the variables, it wont load the page at all.

 

You can make it 404 out if you want to, by including a custom 404 page. Not really sure what you are after. If you want it to be "blank" just remove my echo and it will just be a blank page. But the page will always load to check something, no matter what. It is the directions you give the code that make it "seem" like it does not load. 

[kapz22]

maybe this is not done by setting the $_GET variable....

here is an example of what i am trying to achieve:

 

http://www.beyondsport.org/the-awards/entries/view.php?Id=435

 

if you remove the ?Id=435 the browser goes to the  last page you visited.

[premiso]

They are most likely setting a session variable with the last id viewed or last page viewed. Then if no id is passed it reverts back to the session. Whether this was "coded" that way or not I do not know, as it may have been a mistake on their part in that they have register_globals turned on and if they stored the id in session, it would be set then.

 

Either way, using sessions you can easily achieve this.