diff --git a/backend-php/api.php b/backend-php/api.php
index 0e282bb..78a03c5 100644
--- a/backend-php/api.php
+++ b/backend-php/api.php
@@ -113,7 +113,7 @@ CreateApi(function ($api) {
         // according docs (UPPERCASE, MIN 3 MAX 10)
         $db = db();
         $results = FastDBReq($db, "SELECT * FROM classes WHERE classid = ?", [$classId]);
-        $db = null;
+        
         if (count($results) != 0) {
             return $results[0];
         } else {
@@ -130,7 +130,7 @@ CreateApi(function ($api) {
         // according docs (UPPERCASE, MIN 3 MAX 10)
         $db = db();
         $results = FastDBReq($db, "SELECT userclassname FROM classes WHERE classid = ?", [$classId]);
-        $db = null;
+        
 
         if (count($results) != 0) {
             return $results[0];
@@ -147,7 +147,7 @@ CreateApi(function ($api) {
         $adminId = $req->data['adminId'];
         $db = db();
         $results = FastDBReq($db, "SELECT adminName FROM admins where adminid = ?", [$adminId]);
-        $db = null;
+        
 
         if (count($results) != 0) {
             return $results[0];
@@ -164,7 +164,7 @@ CreateApi(function ($api) {
         $adminId = $req->data['adminId'];
         $db = db();
         $results = FastDBReq($db, "SELECT adminPrems FROM admins where adminid = ?", [$adminId]);
-        $db = null;
+        
 
         if (count($results) != 0) {
             return $results[0];
@@ -181,7 +181,7 @@ CreateApi(function ($api) {
         $adminId = $req->data['adminId'];
         $db = db();
         $results = FastDBReq($db, "SELECT * FROM admins WHERE adminid = ?", [$adminId]);
-        $db = null;
+        
 
         if (count($results) != 0) {
             return $results[0];
@@ -218,7 +218,6 @@ CreateApi(function ($api) {
                 }
             }
             if ($has_full_rings) {
-                $db = null;
                 // with rings
                 return ['data' => $content, 'type' => 2];
             } else {
@@ -229,7 +228,6 @@ CreateApi(function ($api) {
                 if ($rings !== null) {
                     $out = joinArraysByKey($content, $rings, true);
                 }
-                $db = null;
                 return ['data' => $out, 'type' => 1];
             }
         } else {
@@ -245,10 +243,8 @@ CreateApi(function ($api) {
                 if ($rings !== null) {
                     $out = joinArraysByKey($schedule, $rings);
                 }
-                $db = null;
                 return ['data' => $out, 'type' => 0];
             } else {
-                $db = null;
                 return ['data' => []];
             }
         }
@@ -262,7 +258,6 @@ CreateApi(function ($api) {
         $db = db();
         $results = FastDBReq($db, "SELECT * FROM admins WHERE adminId=?", [$adminId]);
         if (count($results) == 0) {
-            $db = null;
             $req->res->code(400);
             return "админ не найден";
             # end
@@ -293,7 +288,6 @@ CreateApi(function ($api) {
                 $rings = json_decode(findClosestDateSort($results, $day)['content'], true);
             }
         }
-        $db = null;
 
         switch ($tab) {
             case 0:
@@ -323,7 +317,6 @@ CreateApi(function ($api) {
             $db = db();
             $results = FastDBReq($db, "SELECT * FROM admins WHERE adminId=?", [$adminId]);
             if (count($results) == 0) {
-                $db = null;
                 $req->res->code(400);
                 return "админ не найден";
                 # end
@@ -334,7 +327,6 @@ CreateApi(function ($api) {
             $newDataRaw = $req->data['newData'];
             $newData = json_decode($newDataRaw, true);
 
-            // im too lazy to close db
 
             switch ($tab) {
                 case 0: // changes
@@ -397,7 +389,6 @@ CreateApi(function ($api) {
         $db = db();
         $results = FastDBReq($db, "SELECT * FROM admins WHERE adminId=?", [$adminId]);
         if (count($results) == 0) {
-            $db = null;
             $req->res->code(400);
             return "админ не найден";
             # end
@@ -417,10 +408,8 @@ CreateApi(function ($api) {
                 FastDBReq($db, 'DELETE FROM rings WHERE classId=? AND fromDate=?', [$classId, $day]);
                 break;
             default:
-                $db = null;
                 return "you saved your live because you didn't know what tabs are here";
         }
-        $db = null;
         return true;
     });
     $api->on('/update_admin', "POST", function ($req) {
@@ -438,12 +427,10 @@ CreateApi(function ($api) {
         $db = db();
         $results = FastDBReq($db, "SELECT * FROM admins WHERE adminId=?", [$adminId]);
         if (count($results) == 0) {
-            $db = null;
             $req->res->code(400);
             return "админ не найден";
         }
         if (!$withSelf && !in_array($results[0]['adminPrems'], [-1, 2])) {
-            $db = null;
             $req->res->code(400);
             return 'нету прав';
         }
@@ -462,7 +449,6 @@ CreateApi(function ($api) {
                     try {
                         FastDBReq($db, 'UPDATE admins SET adminName = ? WHERE adminId = ?', [$value, $adminId]);
                     } catch (PDOException) {
-                        $db = null;
                         return "egor";
                     }
                     break;
@@ -483,16 +469,13 @@ CreateApi(function ($api) {
                     try {
                         FastDBReq($db, 'UPDATE admins SET adminName = ? WHERE adminId = ?', [$value, $person]);
                     } catch (PDOException) {
-                        $db = null;
                         return "egor";
                     }
                     break;
                 default:
-                    $db = null;
                     return "?";
             }
         }
-        $db = null;
         return true;
     });
 
@@ -505,12 +488,10 @@ CreateApi(function ($api) {
         $db = db();
         $results = FastDBReq($db, "SELECT * FROM admins WHERE adminId=?", [$adminId]);
         if (count($results) == 0) {
-            $db = null;
             $req->res->code(400);
             return "админ не найден";
         }
         if (!in_array($results[0]['adminPrems'], [-1, 2])) {
-            $db = null;
             $req->res->code(400);
             return "недостаточно прав";
         }
@@ -519,13 +500,12 @@ CreateApi(function ($api) {
 
         $results = FastDBReq($db, "SELECT * FROM classes WHERE classId=?", [$classId]);
         if (count($results) == 0) {
-            $db = null;
             $req->res->code(400);
             return "класса не существует";
         }
         $classData = $results[0];
         $adminsData = FastDBReq($db, "SELECT * FROM admins WHERE adminClass=?", [$classId]);
-        $db = null;
+
 
         return ["status" => 1, "class" => $classData, "admins" => $adminsData];
     });
@@ -539,12 +519,10 @@ CreateApi(function ($api) {
         $db = db();
         $results = FastDBReq($db, "SELECT * FROM admins WHERE adminId=?", [$adminId]);
         if (count($results) == 0) {
-            $db = null;
             $req->res->code(400);
             return "админ не найден";
         }
         if (!in_array($results[0]['adminPrems'], [-1, 2])) {
-            $db = null;
             $req->res->code(400);
             return "недостаточно прав";
         }
@@ -610,7 +588,6 @@ CreateApi(function ($api) {
                 FastDBReq($db, "DELETE FROM admins WHERE adminId=?", [$person]);
                 return true;
             default:
-                $db = null;
                 return "?";
         }
     });