changed reply button to only be there when user is logged in

threadr/board/board.php

@@ -28,11 +28,16 @@ foreach($statement->fetchAll() as $ROW) {
     $reply_reference = "";
   }
 
+  // determine whether to put a reply button
+  if ($login) {
+    $reply_button = "<a href=\"./?id=" . $_GET['id'] . "&action=post&reply_to=$post_id&end\" class=\"post_reply\"><button class=\"post_reply\">Reply</button></a>";
+  } else {
+    $reply_button = ""
+  }
+
   echo "<section id=\"$post_id\" >
     <div>
-      <a href=\"./?id=" . $_GET['id'] . "&action=post&reply_to=$post_id&end\" class=\"post_reply\">
-        <button class=\"post_reply\">Reply</button>
-      </a>
+      $reply_button
       <h1 class=\"post\">$post_title</h1>
       $reply_reference
     </div>