check $_GET isset then write it to variable? Please help

[effectivesite]

Hey guys I'm a php noob who's inherited this site and can't figure out how to check if the url has a variable in it, then set that variable as something else (sorry if the jargon's wrong)

PHP Code:


function adExtNo($defaultExt = '1004'){
    if(isset($_COOKIE[__FSCOOKIE_PRINT_EXT])){ //Detect custom print media ad ext number
        $adCookie = $_COOKIE[__FSCOOKIE_PRINT_EXT];
        return $adCookie;
    }else{ //Else detect ppc ad ext number
        if(isset($_COOKIE[__FSCOOKIE_PPC_EXT])){
                $adCookie = $_COOKIE[__FSCOOKIE_PPC_EXT];
                return $adCookie;
    }else{ //Else detect ppc ad ext number in url
        if(isset($_GET[ppc_ext])){
                $adCookie = $_GET[ppc_ext];
                return $adCookie;
        }else{ //Else just set ext number to web default
                return $defaultExt;
        }
    }
} 


Currently the code checks for a variable in a cookie then sets $adCookie as that value (I believe). If there's no cookie value then I want it to get the value from the tagged url, and if the url isn't tagged then defaultExt.

I've been trying to add the second }else{ statement to detect a variable in the URL (i.e. url.com/?ppc_ext=1234) then if it exists set $adCookie to that value, else return $defaultExt.

does anyone know how to do this?
Thanks for any help.

[mlseim]

I think you need single quotes as shown:

if(isset($_GET['ppc_ext'])){
$adCookie = $_GET['ppc_ext'];
return $adCookie;

[effectivesite]

Originally Posted by mlseim

I think you need single quotes as shown:

if(isset($_GET['ppc_ext'])){
$adCookie = $_GET['ppc_ext'];
return $adCookie;

Thanks mlseim. Finally got it working without it but I'll try that if it's better coding practice.

just in case anyone else was in need of this, here it is thanks to HuggyEssex on digitalpoint

PHP Code:

function adExtNo($defaultExt = '1004'){
    if(isset($_COOKIE[__FSCOOKIE_PRINT_EXT])) {
        //Detect custom print media ad ext number
        $adCookie = $_COOKIE[__FSCOOKIE_PRINT_EXT];
        return $adCookie;
    }elseif(isset($_COOKIE[__FSCOOKIE_PPC_EXT])) {
        //Else detect ppc ad ext number
        $adCookie = $_COOKIE[__FSCOOKIE_PPC_EXT];
        return $adCookie;
    }elseif(isset($_GET[ppc_ext])) {
        //Else detect ppc ad ext number in url
        $adCookie = $_GET[ppc_ext];
        return $adCookie;
    }else{
        //Else just set ext number to web default
        return $defaultExt;
    }
}