Shorten useless coding?

Question

Creating my loading screen on garrys mod, and seeing this "useless" coding, and was betting that there is a way to shorten it massively, however I am quite a php nooby and was wondering if there was a perhaps a way to use arrays or something to make it easier/shorter? Code Here

Answer 1

$array = array(
   "gm_flatgrass" => "Flatgrass",
   "cs_assault" => "CS Assault",
   "de_train" => "",
   ...
);

$getmap = $_GET['mapname'];

if(array_key_exists($getmap,$array)) {
    $map =  $array[$getmap];
}