diff --git a/hwe/commandlist.php b/hwe/commandlist.php
index c53dd9b2..c6a2e616 100644
--- a/hwe/commandlist.php
+++ b/hwe/commandlist.php
@@ -65,7 +65,7 @@ function myclock() {
 myCommandList();
 
 function myCommandList() {
-    $session = Session::Instance();
+    $session = Session::getInstance();
     global $_basecolor, $_basecolor2, $_basecolor3;
     global $images;
 
diff --git a/hwe/func.php b/hwe/func.php
index 08af199e..38747f40 100644
--- a/hwe/func.php
+++ b/hwe/func.php
@@ -77,7 +77,7 @@ function GetImageURL($imgsvr) {
 }
 
 function checkLimit($con, $conlimit) {
-    $session = Session::Instance();
+    $session = Session::getInstance();
     if($session->userGrade>=4){
         return 0;
     }
@@ -92,7 +92,7 @@ function checkLimit($con, $conlimit) {
 }
 
 function getBlockLevel() {
-    return DB::db()->queryFirstField('select block from general where no = %i', Session::Instance()->generalID);
+    return DB::db()->queryFirstField('select block from general where no = %i', Session::getInstance()->generalID);
 }
 
 function getRandGenName() {
@@ -117,7 +117,7 @@ function getRandGenName() {
 
 
 function cityInfo() {
-    $session = Session::Instance();
+    $session = Session::getInstance();
     global $_basecolor, $_basecolor2, $images;
 
     $db = DB::db();
@@ -232,7 +232,7 @@ function cityInfo() {
 }
 
 function myNationInfo() {
-    $session = Session::Instance();
+    $session = Session::getInstance();
     global $_basecolor, $_basecolor2, $images;
 
     $db = DB::db();
@@ -411,7 +411,7 @@ function commandGroup($typename, $type=0) {
 }
 
 function commandTable() {
-    $session = Session::Instance();
+    $session = Session::getInstance();
     $db = DB::db();
     $connect=$db->get();
 
@@ -649,7 +649,7 @@ function commandTable() {
 }
 
 function CoreCommandTable() {
-    $session = Session::Instance();
+    $session = Session::getInstance();
     $db = DB::db();
     $connect=$db->get();
 
@@ -749,7 +749,7 @@ function CoreCommandTable() {
 function myInfo() {
     $db = DB::db();
     $connect=$db->get();
-    $session = Session::Instance();
+    $session = Session::getInstance();
     
     $query = "select no from general where owner='{$session->userID}'";
     $result = MYDB_query($query, $connect) or Error(__LINE__.MYDB_error($connect),"");
@@ -938,7 +938,7 @@ function generalInfo($no) {
 }
 
 function myInfo2() {
-    $session = Session::Instance();
+    $session = Session::getInstance();
     $db = DB::db();
     $connect=$db->get();
 
@@ -1079,7 +1079,7 @@ function onlinegen() {
     $connect=$db->get();
 
     $onlinegen = "";
-    $generalID = Session::Instance()->generalID;
+    $generalID = Session::getInstance()->generalID;
     $nationID = DB::db()->queryFirstField('select `nation` from `general` where `no` = %i', $generalID);
     if($nationID === null || Util::toInt($nationID) === 0) {
         $query = "select onlinegen from game limit 1";
@@ -1104,7 +1104,7 @@ function onlineNation() {
 }
 
 function nationMsg() {
-    $session = Session::Instance();
+    $session = Session::getInstance();
     $db = DB::db();
     $connect=$db->get();
 
@@ -1256,7 +1256,7 @@ function cutDay($date, int $turnterm) {
 
 function increaseRefresh($type="", $cnt=1) {
     //FIXME: 로그인, 비로그인 시 처리가 명확하지 않음
-    $session = Session::Instance();
+    $session = Session::getInstance();
     $generalID = $session->generalID;
 
     $date = date('Y-m-d H:i:s');
@@ -1519,7 +1519,7 @@ function checkTurn() {
         return;
     }
 
-    $session = Session::Instance();
+    $session = Session::getInstance();
 
     $locklog[0] = "- checkTurn()      : ".date('Y-m-d H:i:s')." : ".$session->userName;
     pushLockLog($locklog);
@@ -2388,7 +2388,7 @@ function getAdmin() {
 function getMe() {
     $db = DB::db();
     $connect=$db->get();
-    $session = Session::Instance();
+    $session = Session::getInstance();
 
     $query = "select * from general where owner='{$session->userID}'";
     $result = MYDB_query($query, $connect) or Error("접속자가 많아 접속을 중단합니다. 잠시후 갱신해주세요.<br>getMe : ".MYDB_error($connect),"");
diff --git a/hwe/func_command.php b/hwe/func_command.php
index b55bb486..a54f3813 100644
--- a/hwe/func_command.php
+++ b/hwe/func_command.php
@@ -455,7 +455,7 @@ function getCoreTurn($nation, $level) {
 
 
 function processCommand($no) {
-    $session = Session::Instance();
+    $session = Session::getInstance();
     $db = DB::db();
     $connect=$db->get();
 
@@ -685,7 +685,7 @@ where nation='{$general['nation']}'
 function command_Single($turn, $command) {
     $db = DB::db();
     $connect=$db->get();
-    $session = Session::Instance();
+    $session = Session::getInstance();
 
     $command = EncodeCommand(0, 0, 0, $command);
 
@@ -704,7 +704,7 @@ function command_Single($turn, $command) {
 function command_Chief($turn, $command) {
     $db = DB::db();
     $connect=$db->get();
-    $session = Session::Instance();
+    $session = Session::getInstance();
 
     $command = EncodeCommand(0, 0, 0, $command);
 
diff --git a/hwe/func_map.php b/hwe/func_map.php
index 8d583d91..51a1afc0 100644
--- a/hwe/func_map.php
+++ b/hwe/func_map.php
@@ -50,7 +50,7 @@ function getWorldMap($req){
         return getHistoryMap($req->year, $req->month);
     }
 
-    $session = Session::Instance();
+    $session = Session::getInstance();
     $generalID = $session->generalID;
 
     $db = DB::db();
diff --git a/hwe/func_message.php b/hwe/func_message.php
index 6fa7d5d9..0b86cedf 100644
--- a/hwe/func_message.php
+++ b/hwe/func_message.php
@@ -78,7 +78,7 @@ function getRawMessage($mailbox, $msgType, $limit=30, $fromSeq=null){
 }
 
 function getMessage($msgType, $nationID=null, $limit=30, $fromSeq=null){
-    $generalID = Session::Instance()->generalID;
+    $generalID = Session::getInstance()->generalID;
     if($generalID === null){
         return [];
     }
@@ -280,7 +280,7 @@ function getMailboxList(){
 function DecodeMsg($msg, $type, $who, $date, $bg, $num=0) {
     $db = DB::db();
     $connect=$db->get();
-    $session = Session::Instance();
+    $session = Session::getInstance();
 
     //FIXME: 폐기
     $query = "select no,nation,name,picture,level from general where owner='{$session->userID}'";
@@ -349,7 +349,7 @@ function moveMsg($table, $msgtype, $msgnum, $msg, $type, $who, $when, $column, $
 function MsgDip($bg) {
     $db = DB::db();
     $connect=$db->get();
-    $session = Session::Instance();
+    $session = Session::getInstance();
 
     $query = "select no,nation from general where owner='{$session->userID}'";
     $result = MYDB_query($query, $connect) or Error(__LINE__.MYDB_error($connect),"");
diff --git a/hwe/func_template.php b/hwe/func_template.php
index f75858f6..bb9112f0 100644
--- a/hwe/func_template.php
+++ b/hwe/func_template.php
@@ -89,7 +89,7 @@ function allButton() {
 function commandButton() {
     global $_basecolor, $_basecolor2;
 
-    $session = Session::Instance();
+    $session = Session::getInstance();
     $generalID = $session->generalID;
     
     if($generalID === null){
diff --git a/hwe/j_map.php b/hwe/j_map.php
index c2e9630b..6d636d7d 100644
--- a/hwe/j_map.php
+++ b/hwe/j_map.php
@@ -4,7 +4,7 @@ namespace sammo;
 include 'lib.php';
 include 'func.php';
 
-$session = Session::Instance()->setReadOnly();
+$session = Session::getInstance()->setReadOnly();
 
 $defaultPost = [
     'year' => null,
diff --git a/hwe/j_msg_contact_list.php b/hwe/j_msg_contact_list.php
index cacbfffd..46c2d0ad 100644
--- a/hwe/j_msg_contact_list.php
+++ b/hwe/j_msg_contact_list.php
@@ -6,7 +6,7 @@ include('func.php');
 
 $session = Session::requireGameLogin([])->setReadOnly();
 
-if(!Session::Instance()->generalID){
+if(!Session::getInstance()->generalID){
     Json::die([
         "nation"=>[]
     ]);
diff --git a/hwe/j_msg_decide_opt.php b/hwe/j_msg_decide_opt.php
index cf2f5a37..ad49dd93 100644
--- a/hwe/j_msg_decide_opt.php
+++ b/hwe/j_msg_decide_opt.php
@@ -8,7 +8,7 @@ include 'func.php';
 $session = Session::requireGameLogin([])->setReadOnly();
 
 
-$generalID = Session::Instance()->generalID;
+$generalID = Session::getInstance()->generalID;
 
 if (!$generalID) {
     Json::die([
diff --git a/hwe/processing.php b/hwe/processing.php
index 2aa86a50..b62c83d6 100644
--- a/hwe/processing.php
+++ b/hwe/processing.php
@@ -176,7 +176,7 @@ function ender($type=0) {
 function command_99($turn) {
     $db = DB::db();
     $connect=$db->get();
-    $session = Session::Instance();
+    $session = Session::getInstance();
 
     $query = "select nation,level from general where owner='{$session->userID}'";
     $result = MYDB_query($query, $connect) or Error(__LINE__.MYDB_error($connect),"");
@@ -238,7 +238,7 @@ function GetExplain() {
 function command_11($turn, $command) {
     $db = DB::db();
     $connect=$db->get();
-    $session = Session::Instance();
+    $session = Session::getInstance();
 
     global $_basecolor, $_basecolor2, $images, $image;
     starter("징병");
@@ -447,7 +447,7 @@ function calc(cost, formnum) {
 function command_12($turn, $command) {
     $db = DB::db();
     $connect=$db->get();
-    $session = Session::Instance();
+    $session = Session::getInstance();
 
     global $_basecolor, $_basecolor2, $images, $image;
     starter("모병");
@@ -658,7 +658,7 @@ function calc(cost, formnum) {
 function command_15($turn, $command) {
     $db = DB::db();
     $connect=$db->get();
-    $session = Session::Instance();
+    $session = Session::getInstance();
 
     starter("재편성");
     $query = "select no,nation from general where owner='{$session->userID}'";
@@ -703,7 +703,7 @@ function command_15($turn, $command) {
 function command_16($turn, $command) {
     $db = DB::db();
     $connect=$db->get();
-    $session = Session::Instance();
+    $session = Session::getInstance();
 
     starter("출병");
     $query = "select city from general where owner='{$session->userID}'";
@@ -746,7 +746,7 @@ function command_16($turn, $command) {
 function command_21($turn, $command) {
     $db = DB::db();
     $connect=$db->get();
-    $session = Session::Instance();
+    $session = Session::getInstance();
 
     starter("이동");
     $query = "select city from general where owner='{$session->userID}'";
@@ -789,7 +789,7 @@ function command_21($turn, $command) {
 function command_22($turn, $command) {
     $db = DB::db();
     $connect=$db->get();
-    $session = Session::Instance();
+    $session = Session::getInstance();
 
     die('비활성화됨');//TODO:등용장 대 디자인
     starter("등용");
@@ -854,7 +854,7 @@ function command_22($turn, $command) {
 function command_23($turn, $command) {
     $db = DB::db();
     $connect=$db->get();
-    $session = Session::Instance();
+    $session = Session::getInstance();
 
     starter("포상", 1);
     $query = "select no,nation from general where owner='{$session->userID}'";
@@ -928,7 +928,7 @@ function command_23($turn, $command) {
 function command_24($turn, $command) {
     $db = DB::db();
     $connect=$db->get();
-    $session = Session::Instance();
+    $session = Session::getInstance();
 
     starter("몰수", 1);
     $query = "select no,nation from general where owner='{$session->userID}'";
@@ -1005,7 +1005,7 @@ function command_25($turn, $command) {
 
     $db = DB::db();
     $connect=$db->get();
-    $session = Session::Instance();
+    $session = Session::getInstance();
 
     starter("임관");
 
@@ -1083,7 +1083,7 @@ function command_25($turn, $command) {
 function command_27($turn, $command) {
     $db = DB::db();
     $connect=$db->get();
-    $session = Session::Instance();
+    $session = Session::getInstance();
 
     starter("발령", 1);
 
@@ -1143,7 +1143,7 @@ function command_27($turn, $command) {
 function command_30($turn, $command) {
     $db = DB::db();
     $connect=$db->get();
-    $session = Session::Instance();
+    $session = Session::getInstance();
 
     starter("강행");
     $query = "select city from general where owner='{$session->userID}'";
@@ -1186,7 +1186,7 @@ ender();
 function command_31($turn, $command) {
     $db = DB::db();
     $connect=$db->get();
-    $session = Session::Instance();
+    $session = Session::getInstance();
 
     starter("첩보");
     $query = "select city from general where owner='{$session->userID}'";
@@ -1233,7 +1233,7 @@ function command_31($turn, $command) {
 function command_32($turn, $command) {
     $db = DB::db();
     $connect=$db->get();
-    $session = Session::Instance();
+    $session = Session::getInstance();
 
     starter("화계");
     $query = "select city from general where owner='{$session->userID}'";
@@ -1275,7 +1275,7 @@ function command_32($turn, $command) {
 function command_33($turn, $command) {
     $db = DB::db();
     $connect=$db->get();
-    $session = Session::Instance();
+    $session = Session::getInstance();
 
     starter("탈취");
     $query = "select city from general where owner='{$session->userID}'";
@@ -1317,7 +1317,7 @@ function command_33($turn, $command) {
 function command_34($turn, $command) {
     $db = DB::db();
     $connect=$db->get();
-    $session = Session::Instance();
+    $session = Session::getInstance();
 
     starter("파괴");
     $query = "select city from general where owner='{$session->userID}'";
@@ -1359,7 +1359,7 @@ function command_34($turn, $command) {
 function command_35($turn, $command) {
     $db = DB::db();
     $connect=$db->get();
-    $session = Session::Instance();
+    $session = Session::getInstance();
 
     starter("선동");
     $query = "select city from general where owner='{$session->userID}'";
@@ -1401,7 +1401,7 @@ function command_35($turn, $command) {
 function command_36($turn, $command) {
     $db = DB::db();
     $connect=$db->get();
-    $session = Session::Instance();
+    $session = Session::getInstance();
 
     starter("기습");
     $query = "select city from general where owner='{$session->userID}'";
@@ -1443,7 +1443,7 @@ function command_36($turn, $command) {
 function command_43($turn, $command) {
     $db = DB::db();
     $connect=$db->get();
-    $session = Session::Instance();
+    $session = Session::getInstance();
 
     starter("증여");
     $query = "select no,nation from general where owner='{$session->userID}'";
@@ -1663,7 +1663,7 @@ function command_46($turn, $command) {
 function command_48($turn, $command) {
     $db = DB::db();
     $connect=$db->get();
-    $session = Session::Instance();
+    $session = Session::getInstance();
 
     starter("장비 매매");
 
@@ -1780,7 +1780,7 @@ function command_49($turn, $command) {
 function command_51($turn, $command) {
     $db = DB::db();
     $connect=$db->get();
-    $session = Session::Instance();
+    $session = Session::getInstance();
 
     starter("항복 권고", 1);
 
@@ -1835,7 +1835,7 @@ function command_51($turn, $command) {
 function command_52($turn, $command) {
     $db = DB::db();
     $connect=$db->get();
-    $session = Session::Instance();
+    $session = Session::getInstance();
 
     starter("원조", 1);
 
@@ -1913,7 +1913,7 @@ function command_52($turn, $command) {
 function command_53($turn, $command) {
     $db = DB::db();
     $connect=$db->get();
-    $session = Session::Instance();
+    $session = Session::getInstance();
 
     starter("통합제의", 1);
 
@@ -1982,7 +1982,7 @@ function command_53($turn, $command) {
 function command_54($turn, $command) {
     $db = DB::db();
     $connect=$db->get();
-    $session = Session::Instance();
+    $session = Session::getInstance();
 
     starter("선양");
     $query = "select no,nation from general where owner='{$session->userID}'";
@@ -2029,7 +2029,7 @@ function command_54($turn, $command) {
 function command_61($turn, $command) {
     $db = DB::db();
     $connect=$db->get();
-    $session = Session::Instance();
+    $session = Session::getInstance();
 
     starter("불가침", 1);
 
@@ -2113,7 +2113,7 @@ function command_61($turn, $command) {
 function command_62($turn, $command) {
     $db = DB::db();
     $connect=$db->get();
-    $session = Session::Instance();
+    $session = Session::getInstance();
 
     starter("선전포고", 1);
 
@@ -2180,7 +2180,7 @@ function command_62($turn, $command) {
 function command_63($turn, $command) {
     $db = DB::db();
     $connect=$db->get();
-    $session = Session::Instance();
+    $session = Session::getInstance();
 
     starter("종전", 1);
 
@@ -2239,7 +2239,7 @@ function command_63($turn, $command) {
 function command_64($turn, $command) {
     $db = DB::db();
     $connect=$db->get();
-    $session = Session::Instance();
+    $session = Session::getInstance();
 
     starter("파기", 1);
 
@@ -2298,7 +2298,7 @@ function command_64($turn, $command) {
 function command_65($turn, $command) {
     $db = DB::db();
     $connect=$db->get();
-    $session = Session::Instance();
+    $session = Session::getInstance();
 
     starter("초토화", 1);
     $query = "select city from general where owner='{$session->userID}'";
@@ -2338,7 +2338,7 @@ echo "<br>
 function command_66($turn, $command) {
     $db = DB::db();
     $connect=$db->get();
-    $session = Session::Instance();
+    $session = Session::getInstance();
 
     starter("천도", 1);
     $query = "select city from general where owner='{$session->userID}'";
@@ -2379,7 +2379,7 @@ echo "<br>
 function command_67($turn, $command) {
     $db = DB::db();
     $connect=$db->get();
-    $session = Session::Instance();
+    $session = Session::getInstance();
 
     starter("증축", 1);
     $query = "select city from general where owner='{$session->userID}'";
@@ -2420,7 +2420,7 @@ echo "<br>
 function command_68($turn, $command) {
     $db = DB::db();
     $connect=$db->get();
-    $session = Session::Instance();
+    $session = Session::getInstance();
 
     starter("감축", 1);
     $query = "select city from general where owner='{$session->userID}'";
@@ -2461,7 +2461,7 @@ echo "<br>
 function command_72($turn, $command) {
     $db = DB::db();
     $connect=$db->get();
-    $session = Session::Instance();
+    $session = Session::getInstance();
 
     starter("백성동원", 1);
     $query = "select city from general where owner='{$session->userID}'";
@@ -2502,7 +2502,7 @@ echo "<br>
 function command_73($turn, $command) {
     $db = DB::db();
     $connect=$db->get();
-    $session = Session::Instance();
+    $session = Session::getInstance();
 
     starter("수몰", 1);
     $query = "select city from general where owner='{$session->userID}'";
@@ -2543,7 +2543,7 @@ echo "<br>
 function command_74($turn, $command) {
     $db = DB::db();
     $connect=$db->get();
-    $session = Session::Instance();
+    $session = Session::getInstance();
 
     starter("허보", 1);
     $query = "select city from general where owner='{$session->userID}'";
@@ -2584,7 +2584,7 @@ echo "<br>
 function command_75($turn, $command) {
     $db = DB::db();
     $connect=$db->get();
-    $session = Session::Instance();
+    $session = Session::getInstance();
 
     starter("피장파장", 1);
 
@@ -2644,7 +2644,7 @@ function command_75($turn, $command) {
 function command_77($turn, $command) {
     $db = DB::db();
     $connect=$db->get();
-    $session = Session::Instance();
+    $session = Session::getInstance();
 
     starter("이호경식", 1);
 
@@ -2704,7 +2704,7 @@ function command_77($turn, $command) {
 function command_78($turn, $command) {
     $db = DB::db();
     $connect=$db->get();
-    $session = Session::Instance();
+    $session = Session::getInstance();
 
     starter("급습", 1);
 
diff --git a/i_entrance/j_logout.php b/i_entrance/j_logout.php
index 6433be37..63d0c3ea 100644
--- a/i_entrance/j_logout.php
+++ b/i_entrance/j_logout.php
@@ -3,7 +3,7 @@ namespace sammo;
 
 require(__dir__.'/../vendor/autoload.php');
 
-$session = Session::Instance();
+$session = Session::getInstance();
 if(!$session->isLoggedIn()){
     //로그인 안했다니까...
     Json::die([
diff --git a/index.php b/index.php
index f80b87fb..1be59d9e 100644
--- a/index.php
+++ b/index.php
@@ -9,7 +9,7 @@ if(!class_exists('\\sammo\\RootDB')){
 }
 
 
-$session = Session::Instance();
+$session = Session::getInstance();
 
 use \kakao\KakaoKey as KakaoKey;
 
diff --git a/j_login.php b/j_login.php
index 069e92c9..4565cdf5 100644
--- a/j_login.php
+++ b/j_login.php
@@ -5,7 +5,7 @@ require(__dir__.'/vendor/autoload.php');
 
 
 $RootDB = RootDB::db();
-$session = Session::Instance();
+$session = Session::getInstance();
 if($session->isLoggedIn()){
     $session->logout();
 }
diff --git a/oauth_kakao/j_check_dup.php b/oauth_kakao/j_check_dup.php
index a0670fc3..e76e0b90 100644
--- a/oauth_kakao/j_check_dup.php
+++ b/oauth_kakao/j_check_dup.php
@@ -5,7 +5,7 @@ require(__dir__.'/../vendor/autoload.php');
 require('lib.join.php');
 
 
-$session = Session::Instance()->setReadOnly();
+$session = Session::getInstance()->setReadOnly();
 
 $access_token = $session->access_token;
 if(!$access_token){
diff --git a/oauth_kakao/j_join_process.php b/oauth_kakao/j_join_process.php
index b044c1e7..6c43f866 100644
--- a/oauth_kakao/j_join_process.php
+++ b/oauth_kakao/j_join_process.php
@@ -6,7 +6,7 @@ require('lib.join.php');
 
 use \kakao\Kakao_REST_API_Helper as Kakao_REST_API_Helper;
 
-$session = Session::Instance();
+$session = Session::getInstance();
 
 $canJoin = RootDB::db()->queryFirstField('SELECT REG FROM `SYSTEM` WHERE `NO` = 1');
 if($canJoin != 'Y'){
diff --git a/oauth_kakao/j_login_oauth.php b/oauth_kakao/j_login_oauth.php
index ffb8edba..f1e05874 100644
--- a/oauth_kakao/j_login_oauth.php
+++ b/oauth_kakao/j_login_oauth.php
@@ -6,7 +6,7 @@ require(__dir__.'/../vendor/autoload.php');
 use \kakao\Kakao_REST_API_Helper as Kakao_REST_API_Helper;
 
 $RootDB = RootDB::db();
-$session = Session::Instance();
+$session = Session::getInstance();
 if($session->isLoggedIn()){
     $session->logout();
 }
diff --git a/oauth_kakao/join.php b/oauth_kakao/join.php
index d5243623..f07be930 100644
--- a/oauth_kakao/join.php
+++ b/oauth_kakao/join.php
@@ -5,7 +5,7 @@ require(__dir__.'/../vendor/autoload.php');
 
 
 WebUtil::setHeaderNoCache();
-$session = Session::Instance()->setReadOnly();
+$session = Session::getInstance()->setReadOnly();
 
 $access_token = $session->access_token;
 if(!$access_token){
diff --git a/oauth_kakao/oauth.php b/oauth_kakao/oauth.php
index f297e451..2c121200 100644
--- a/oauth_kakao/oauth.php
+++ b/oauth_kakao/oauth.php
@@ -30,7 +30,7 @@ if (Util::array_get($result['expires_in'], -1) <= 0) {
     die('알 수 없는 에러:'.$me['msg']);
 }
 
-$session = Session::Instance();
+$session = Session::getInstance();
 
 $restAPI->set_access_token($result['access_token']);
 $now = TimeUtil::DatetimeNow();
diff --git a/src/sammo/Session.php b/src/sammo/Session.php
index 3474a4af..a9c73f5c 100644
--- a/src/sammo/Session.php
+++ b/src/sammo/Session.php
@@ -31,7 +31,7 @@ class Session {
     private $writeClosed = false;
     private $sessionID = null;
 
-    public static function Instance(): Session{
+    public static function getInstance(): Session{
         static $inst = null;
         if($inst === null){
             $inst = new Session();
@@ -69,7 +69,7 @@ class Session {
     }
 
     public static function requireLogin($result = '..'): Session{
-        $session = Session::Instance();
+        $session = Session::getInstance();
         if($session->isLoggedIn()){
             return $session;
         }
@@ -278,7 +278,7 @@ class Session {
             $obj = self::requireLogin($exitPath);
         }
         else{
-            $obj = self::Instance();
+            $obj = self::getInstance();
         }
         
         return $obj->userGrade;
@@ -294,7 +294,7 @@ class Session {
             $obj = self::requireLogin($exitPath);
         }
         else{
-            $obj = self::Instance();
+            $obj = self::getInstance();
         }
         
         return $obj->userID;