refactor: use increment/decrement assign

app/Http/Controllers/Auth/TwoStepController.php

@@ -74,7 +74,7 @@ class TwoStepController extends Controller
      */
     private function invalidCodeReturnData($errors = null)
     {
-        $this->_authCount = $this->_twoStepAuth->authCount += 1;
+        $this->_authCount = ++$this->_twoStepAuth->authCount;
         $this->_twoStepAuth->save();
 
         $returnData = [

app/Http/Controllers/InviteController.php

@@ -131,7 +131,7 @@ class InviteController extends Controller
         }
         Mail::to($request->input('email'))->send(new InviteUser($invite));
         $invite->save();
-        $user->invites -= 1;
+        --$user->invites;
         $user->save();
 
         return redirect()->route('invites.create')

app/Http/Controllers/RequestController.php

@@ -459,7 +459,7 @@ class RequestController extends Controller
         $user = $request->user();
 
         $tr = TorrentRequest::with('user')->findOrFail($id);
-        $tr->votes += 1;
+        ++$tr->votes;
         $tr->bounty += $request->input('bonus_value');
         $tr->created_at = Carbon::now();
 

app/Models/Topic.php

@@ -212,7 +212,7 @@ class Topic extends Model
     {
         $count = 0;
         foreach ($this->posts as $post) {
-            $count += 1;
+            ++$count;
             if ($searchId == $post->id) {
                 break;
             }