diff --git a/adm/board_copy_update.php b/adm/board_copy_update.php
index 3a3a81675..ef80a0ebc 100644
--- a/adm/board_copy_update.php
+++ b/adm/board_copy_update.php
@@ -191,7 +191,6 @@ if ($copy_case == 'schema_data_both') {
     sql_query($sql, false);
 
     // 4.00.01
-    // 위의 코드는 같은 테이블명을 사용하였다는 오류가 발생함. (희한하네 ㅡㅡ;)
     $sql = " select * from {$g5['board_file_table']} where bo_table = '$bo_table' ";
     $result = sql_query($sql, false);
     for ($i = 0; $row = sql_fetch_array($result); $i++) {
diff --git a/bbs/write_update.php b/bbs/write_update.php
index 7eb821663..1ead118c3 100644
--- a/bbs/write_update.php
+++ b/bbs/write_update.php
@@ -258,7 +258,6 @@ if ($w == '' || $w == 'r') {
         $wr_reply = '';
     }
     
-    // wr_num 서브쿼리 kkigomi 님 제안
     $sql = " insert into $write_table
                 set wr_num = " . ($w == 'r' ? "'$wr_num'" : "(SELECT IFNULL(MIN(wr_num) - 1, -1) FROM $write_table sq) ") . ",
                      wr_reply = '$wr_reply',
diff --git a/common.php b/common.php
index bb4da63b1..c541f5f2b 100644
--- a/common.php
+++ b/common.php
@@ -484,6 +484,7 @@ if (isset($_REQUEST['w'])) {
     $w = '';
 }
 
+/** @var int $wr_id 게시판 글의 ID */
 if (isset($_REQUEST['wr_id'])) {
     $wr_id = (int)$_REQUEST['wr_id'];
 } else {
@@ -581,27 +582,30 @@ if (isset($_SESSION['ss_mb_id']) && $_SESSION['ss_mb_id']) { // 로그인중이
 }
 
 
+/** @var array $write 글 데이터 */
 $write = array();
+/** @var string $write_table 게시판 테이블 전체이름 */
 $write_table = '';
 if ($bo_table) {
     $board = get_board_db($bo_table, true);
     if (isset($board['bo_table']) && $board['bo_table']) {
         set_cookie("ck_bo_table", $board['bo_table'], 86400 * 1);
         $gr_id = $board['gr_id'];
-        $write_table = $g5['write_prefix'] . $bo_table; // 게시판 테이블 전체이름
+        // 게시판 테이블 전체이름
+        $write_table = $g5['write_prefix'] . $bo_table; 
 
         if (isset($wr_id) && $wr_id) {
             $write = get_write($write_table, $wr_id);
         } else if (isset($wr_seo_title) && $wr_seo_title) {
             $write = get_content_by_field($write_table, 'bbs', 'wr_seo_title', generate_seo_title($wr_seo_title));
-            if( isset($write['wr_id']) ){
-                $wr_id = $write['wr_id'];
+            if (isset($write['wr_id'])) {
+                $wr_id = (int) $write['wr_id'];
             }
         }
     }
-    
-    // 게시판에서 
-    if (isset($board['bo_select_editor']) && $board['bo_select_editor']){
+
+    // 게시판에서 사용하는 에디터를 설정
+    if (isset($board['bo_select_editor']) && $board['bo_select_editor']) {
         $config['cf_editor'] = $board['bo_select_editor'];
     }
 }
diff --git a/lib/Cache/obj.class.php b/lib/Cache/obj.class.php
index 807be9f20..a974fbf03 100644
--- a/lib/Cache/obj.class.php
+++ b/lib/Cache/obj.class.php
@@ -72,7 +72,6 @@ Class G5_object_cache {
      * @param string $key
      * @param string $group
      * @return bool
-     * kkigomi 님이 고쳐주심
      */
     function delete($type, $key, $group = 'default')
     {
diff --git a/lib/common.lib.php b/lib/common.lib.php
index ed91b53b8..edf06a002 100644
--- a/lib/common.lib.php
+++ b/lib/common.lib.php
@@ -2475,14 +2475,19 @@ function check_device($device)
 }
 
 
-// 게시판 최신글 캐시 파일 삭제
+/**
+ * 게시판 최신글 캐시 파일 삭제
+ * @param string $bo_table 게시판 ID
+ */
 function delete_cache_latest($bo_table)
 {
     if (!preg_match("/^([A-Za-z0-9_]{1,20})$/", $bo_table)) {
         return;
     }
 
-    g5_delete_cache_by_prefix('latest-'.$bo_table.'-');
+    run_event('delete_cache_latest', $bo_table);
+
+    g5_delete_cache_by_prefix('latest-' . $bo_table . '-');
 }
 
 // 게시판 첨부파일 썸네일 삭제
@@ -3815,7 +3820,7 @@ function check_vaild_callback($callback){
 class str_encrypt
 {
     var $salt;
-    var $lenght;
+    var $length;
 
     function __construct($salt='')
     {
@@ -4168,7 +4173,7 @@ function get_random_token_string($length=6)
     }
 
     $characters = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz';
-    $output = substr(str_shuffle($characters), 0, $length);     // jihan001 님 제안코드로 수정
+    $output = substr(str_shuffle($characters), 0, $length);
 
     return bin2hex($output);
 }