You can either use the number returned as a key to the array, so that the last line in your example might be:
PHP Code:
echo $array[$get_select];
Or else you can make the array keys the values you want to get back, like:
PHP Code:
$array = array("option 1" => "option 1","option 2" => "option 2","option 3" => "option 3","option 4" => "option 4","option 5" => "option 5");
I'd probably go with the first one if you can because if you use the same text you display you might run it to problems if it contains punctuation or something. If the choices are simple strings then it probably doesn't matter. Actually it might not matter either way, I guess it's just that I would do it the first way because I'm not sure.