diff --git a/src/danog/MadelineProto/API.php b/src/danog/MadelineProto/API.php
index e92357a9..a5095f7e 100644
--- a/src/danog/MadelineProto/API.php
+++ b/src/danog/MadelineProto/API.php
@@ -21,8 +21,8 @@ class API extends Tools
         set_error_handler(['\danog\MadelineProto\Exception', 'ExceptionErrorHandler']);
         $this->session = new MTProto($params);
         $ping_res = $this->ping(3);
-        if(isset($ping["_"]) && $ping["_"] == "pong") {
-            $this->log->log("Pong: ".$ping["ping_id"]);
+        if (isset($ping['_']) && $ping['_'] == 'pong') {
+            $this->log->log('Pong: '.$ping['ping_id']);
         }
         $future_salts = $this->get_future_salts(3);
     }
diff --git a/src/danog/MadelineProto/MTProto.php b/src/danog/MadelineProto/MTProto.php
index b055f13f..de2d5436 100644
--- a/src/danog/MadelineProto/MTProto.php
+++ b/src/danog/MadelineProto/MTProto.php
@@ -142,11 +142,11 @@ Slv8kg9qv1m6XHVQY3PnEw+QQtqSIXklHwIDAQAB
                 )
              ),
         ]);
-        $this->log->log("Current dc is ".$nearestDc["this_dc"].", nearest dc is ".$nearestDc["nearest_dc"]." in ".$nearestDc["country"].".");
-        
-        if ($nearestDc["nearest_dc"] != $nearestDc["this_dc"]) {
-            $this->log->log("Switching to dc ".$nearestDc["nearest_dc"]."...");
-            $this->connection->dc_connect($nearestDc["nearest_dc"]);
+        $this->log->log('Current dc is '.$nearestDc['this_dc'].', nearest dc is '.$nearestDc['nearest_dc'].' in '.$nearestDc['country'].'.');
+
+        if ($nearestDc['nearest_dc'] != $nearestDc['this_dc']) {
+            $this->log->log('Switching to dc '.$nearestDc['nearest_dc'].'...');
+            $this->connection->dc_connect($nearestDc['nearest_dc']);
         }
     }
 
diff --git a/src/danog/MadelineProto/TL/TL.php b/src/danog/MadelineProto/TL/TL.php
index 644babcb..c0d7c01d 100644
--- a/src/danog/MadelineProto/TL/TL.php
+++ b/src/danog/MadelineProto/TL/TL.php
@@ -159,10 +159,11 @@ class TL
             case '!X':
                 return $value;
             case 'Vector t':
-                $concat = \danog\PHP\Struct::pack('<i', $this->constructor_type["vector"]->id);
+                $concat = \danog\PHP\Struct::pack('<i', $this->constructor_type['vector']->id);
                 foreach ($value as $curv) {
                     $concat .= $this->serialize_param($subtype, null, $curv);
                 }
+
                 return $concat;
             default:
                 throw new Exception("Couldn't serialize param with type ".$type_);