Grab value from url string and test if null

I am trying to check if a url string value is present with the following code:

if ($_GET["link_inid"] != NULL){
$link_inid = "null";
}

If the address in the browser is (eg):

then the code errors. However, if the url is:

then the code works fine.

However all I want to do is (below is in asp):

If request("link_inid") = ""
varlink_inid = "null"
else
varlink_inid = request("link_inid")
end if

Basically just set a variable (varlink_inid) = to the url string value.

Thanks for any insights.
🙂

Try

$varlink_inid = @ $_GET['link_inid'];

tserbis,

Fantastic, thanks !!!!!

fizzystutter !!!

the correct way would be to use isset().

if (isset($_GET['key']) { //...