Fix deprecation and connection errors for PHP 8.5+

- Prevent null format in sprintf (getJoinLink)
- Suppress fwrite warnings on dead sockets

Author: smv7

src/GameQ/Query/Native.php

@@ -59,8 +59,16 @@ public function write($data)
                 $this->create();
             }
 
+            if (!is_resource($this->socket)) {
+                throw new Exception('Socket is not a valid resource');
+            }
+
             // Send the packet
-            return fwrite($this->socket, $data);
+            $bytes = @fwrite($this->socket, $data);
+            if ($bytes === false) {
+                throw new Exception('Failed to write to socket');
+            }
+            return $bytes;
         } catch (\Exception $e) {
             throw new Exception($e->getMessage(), $e->getCode(), $e);
         }

src/GameQ/Server.php

@@ -322,7 +322,7 @@ public function getJoinLink()
         }
 
         // Fill the template to build the final joinLink
-        return sprintf($joinLink, $this->ip, $this->portClient());
+        return !isset($this->join_link) ? '' : sprintf($joinLink, $this->ip, $this->portClient());
     }
 
     // Socket holding