i want to create a link like the below:
<a href="'.$_SERVER["REQUEST_URI"].'?&action=approve&holiday='.$result["sequence"].'">
the $_SERVER["REQUEST_URI"] includes any $_GET variables already set, but i am not sure whether to put a ? or & after this in the href because $_SERVER["REQUEST_URI"] could already include a $_GET variable therefore it would need & and not a ?
 
     
    