diff --git a/classes/context/Context.class.php b/classes/context/Context.class.php
index d3079e119..2722f77dd 100644
--- a/classes/context/Context.class.php
+++ b/classes/context/Context.class.php
@@ -80,7 +80,7 @@
                 list($lang_prefix, $lang_text) = explode(',',$val);
                 $lang_text = trim($lang_text);
                 $lang_supported[$lang_prefix] = $lang_text;
-                if(!$this->lang_type && ereg($lang_prefix, strtolower($_SERVER['HTTP_ACCEPT_LANGUAGE']))) {
+                if(!$this->lang_type && stripos($_SERVER['HTTP_ACCEPT_LANGUAGE'],$lang_prefix)!==false) {
                     $this->lang_type = $lang_prefix;
                     setcookie('lang_type', $this->lang_type, time()+60*60*24*365, '/');
                 }
@@ -504,7 +504,7 @@
          **/
         function _setUploadedArgument() {
             if($this->_getRequestMethod() != 'POST') return;
-            if(!eregi("^multipart\/form-data", $_SERVER['CONTENT_TYPE'])) return;
+            if(stripos($_SERVER['CONTENT_TYPE'],"multipart/form-data")===false) return;
             if(!$_FILES) return;
 
             foreach($_FILES as $key => $val) {
@@ -575,7 +575,7 @@
                 } elseif($var_count == 2) {
                     asort($var_keys);
                     $target = implode('.',$var_keys);
-                    if($target=='act.mid' && !ereg('([A-Z]+)',$get_vars['act'])) return sprintf('%s%s/%s',$this->path,$get_vars['mid'],$get_vars['act']);
+                    if($target=='act.mid' && !preg_match('/([A-Z]+)/',$get_vars['act'])) return sprintf('%s%s/%s',$this->path,$get_vars['mid'],$get_vars['act']);
                     elseif($target=='document_srl.mid')  return sprintf('%s%s/%s',$this->path,$get_vars['mid'],$get_vars['document_srl']);
                     elseif($target=='act.document_srl')  return sprintf('%s%s/%s',$this->path,$get_vars['document_srl'],$get_vars['act']);
                     elseif($target=='mid.page')  return sprintf('%s%s/page/%s',$this->path,$get_vars['mid'],$get_vars['page']);
@@ -714,7 +714,7 @@
         function _addJsFile($file) {
             if(in_array($file, $this->js_files)) return;
 
-            if(!eregi("^http:\/\/",$file)) $file = str_replace(realpath("."), ".", realpath($file));
+            if(stripos($file,'http://')===false) $file = str_replace(realpath("."), ".", realpath($file));
             $this->js_files[] = $file;
         }
 
@@ -749,7 +749,7 @@
         function _addCSSFile($file) {
             if(in_array($file, $this->css_files)) return;
 
-            if(!eregi("^http:\/\/",$file)) $file = str_replace(realpath("."), ".", realpath($file));
+            if(stripos($file,'http://')===false) $file = str_replace(realpath("."), ".", realpath($file));
             $this->css_files[] = $file;
         }
 
@@ -890,8 +890,8 @@
          * @brief <!--Meta:파일이름.(css|js)-->를 변경
          **/
         function transMeta($matches) {
-            if(eregi('\.css$', $matches[1])) $this->addCSSFile($matches[1]);
-            elseif(eregi('\.js$', $matches[1])) $this->addJSFile($matches[1]);
+            if(substr($matches[1],'-4')=='.css') $this->addCSSFile($matches[1]);
+            elseif(substr($matches[1],'-3')=='.js') $this->addJSFile($matches[1]);
         }
 
         /**
diff --git a/classes/db/DB.class.php b/classes/db/DB.class.php
index 7e8c79af1..753e48459 100644
--- a/classes/db/DB.class.php
+++ b/classes/db/DB.class.php
@@ -83,7 +83,7 @@
             for($i=0;$i<count($supported_list);$i++) {
                 $db_type = $supported_list[$i];
 
-                if(version_compare(phpversion(), '5.0') < 0 && eregi('pdo',$db_type)) continue;
+                if(version_compare(phpversion(), '5.0') < 0 && stripos($db_type, 'pdo') !== false) continue;
 
                 $class_name = sprintf("DB%s%s", strtoupper(substr($db_type,0,1)), strtolower(substr($db_type,1)));
                 $class_file = sprintf("./classes/db/%s.class.php", $class_name);
@@ -278,24 +278,24 @@
             switch($filter_type) {
                 case 'email' :
                 case 'email_address' :
-                        if(!eregi('^[_0-9a-z-]+(\.[_0-9a-z-]+)*@[0-9a-z-]+(\.[0-9a-z-]+)*$', $val)) return new Object(-1, sprintf($lang->filter->invalid_email, $lang->{$key}?$lang->{$key}:$key));
+                        if(!preg_match('/^[_0-9a-z-]+(\.[_0-9a-z-]+)*@[0-9a-z-]+(\.[0-9a-z-]+)*$/is', $val)) return new Object(-1, sprintf($lang->filter->invalid_email, $lang->{$key}?$lang->{$key}:$key));
                     break;
                 case 'homepage' :
-                        if(!eregi('^(http|https)+(:\/\/)+[0-9a-z_-]+\.[^ ]+$', $val)) return new Object(-1, sprintf($lang->filter->invalid_homepage, $lang->{$key}?$lang->{$key}:$key));
+                        if(!preg_match('/^(http|https)+(:\/\/)+[0-9a-z_-]+\.[^ ]+$/is', $val)) return new Object(-1, sprintf($lang->filter->invalid_homepage, $lang->{$key}?$lang->{$key}:$key));
                     break;
                 case 'userid' :
                 case 'user_id' :
-                        if(!eregi('^[a-zA-Z]+([_0-9a-zA-Z]+)*$', $val)) return new Object(-1, sprintf($lang->filter->invalid_userid, $lang->{$key}?$lang->{$key}:$key));
+                        if(!preg_match('/^[a-zA-Z]+([_0-9a-zA-Z]+)*$/is', $val)) return new Object(-1, sprintf($lang->filter->invalid_userid, $lang->{$key}?$lang->{$key}:$key));
                     break;
                 case 'number' :
                 case 'numbers' :
-                        if(!eregi('^[0-9,]+$', $val)) return new Object(-1, sprintf($lang->filter->invalid_number, $lang->{$key}?$lang->{$key}:$key));
+                        if(!preg_match('/^[0-9,]+$/is', $val)) return new Object(-1, sprintf($lang->filter->invalid_number, $lang->{$key}?$lang->{$key}:$key));
                     break;
                 case 'alpha' :
-                        if(!eregi('^[a-z]+$', $val)) return new Object(-1, sprintf($lang->filter->invalid_alpha, $lang->{$key}?$lang->{$key}:$key));
+                        if(!preg_match('/^[a-z]+$/is', $val)) return new Object(-1, sprintf($lang->filter->invalid_alpha, $lang->{$key}?$lang->{$key}:$key));
                     break;
                 case 'alpha_number' :
-                        if(!eregi('^[0-9a-z]+$', $val)) return new Object(-1, sprintf($lang->filter->invalid_alpha_number, $lang->{$key}?$lang->{$key}:$key));
+                        if(!preg_match('/^[0-9a-z]+$/is', $val)) return new Object(-1, sprintf($lang->filter->invalid_alpha_number, $lang->{$key}?$lang->{$key}:$key));
                     break;
             }
 
diff --git a/classes/mail/Mail.class.php b/classes/mail/Mail.class.php
index cbd3dcd3b..3fbf9c17e 100644
--- a/classes/mail/Mail.class.php
+++ b/classes/mail/Mail.class.php
@@ -106,7 +106,7 @@
         }
 
         function isVaildMailAddress($email_address) {
-            if( eregi("([a-z0-9\_\-\.]+)@([a-z0-9\_\-\.]+)", $email_address) ) return $email_address;
+            if( preg_match("/([a-z0-9\_\-\.]+)@([a-z0-9\_\-\.]+)/i", $email_address) ) return $email_address;
             else return ''; 
         }
     }
diff --git a/classes/module/ModuleHandler.class.php b/classes/module/ModuleHandler.class.php
index 7147b05bb..3f9fdd06b 100644
--- a/classes/module/ModuleHandler.class.php
+++ b/classes/module/ModuleHandler.class.php
@@ -57,9 +57,9 @@
             else $this->module_srl = (int)$module_srl;
 
             // 기본 변수들의 검사 (XSS방지를 위한 기초적 검사)
-            if($this->module && !eregi("^([a-z0-9\_\-]+)$",$this->module)) die(Context::getLang("msg_invalid_request"));
-            if($this->mid && !eregi("^([a-z0-9\_\-]+)$",$this->mid)) die(Context::getLang("msg_invalid_request"));
-            if($this->act && !eregi("^([a-z0-9\_\-]+)$",$this->act)) die(Context::getLang("msg_invalid_request"));
+            if($this->module && !preg_match("/^([a-z0-9\_\-]+)$/i",$this->module)) die(Context::getLang("msg_invalid_request"));
+            if($this->mid && !preg_match("/^([a-z0-9\_\-]+)$/i",$this->mid)) die(Context::getLang("msg_invalid_request"));
+            if($this->act && !preg_match("/^([a-z0-9\_\-]+)$/i",$this->act)) die(Context::getLang("msg_invalid_request"));
 
             // 애드온 실행 (모듈 실행 전)
             $called_position = 'before_module_init';
diff --git a/classes/optimizer/Optimizer.class.php b/classes/optimizer/Optimizer.class.php
index c63597cd5..3caaef681 100644
--- a/classes/optimizer/Optimizer.class.php
+++ b/classes/optimizer/Optimizer.class.php
@@ -42,7 +42,7 @@
             foreach($source_files as $file) {
                 if(!$file) continue;
                 $file = str_replace("\\","/",$file);
-                if(eregi("^http:\/\/",$file) || $file == './common/css/button.css') $files[] = $file;
+                if(substr($file,7)=='http://' || $file == './common/css/button.css') $files[] = $file;
                 else $targets[] = $file;
             }
 
@@ -105,7 +105,7 @@
                 $content_buff .= $str."\n";
             }
             if($type == "css") $content_buff = '@charset "utf-8";'."\n".$content_buff;
-            $content_file = eregi_replace("\.php$","",$filename);
+            $content_file = substr($filename, 0, -1);
             $content_filename = str_replace($this->cache_path, '', $content_file);
 
             FileHandler::writeFile($content_file, $content_buff);
@@ -152,7 +152,7 @@ exit();
          * @brief css의 경우 import/ background 등의 속성에서 사용되는 url내의 경로를 변경시켜줌
          **/
         function replaceCssPath($file, $str) {
-            $this->tmp_css_path = Context::getRequestUri().ereg_replace("^\.\/","",dirname($file))."/";
+            $this->tmp_css_path = Context::getRequestUri().preg_replace("/^\.\//is","",dirname($file))."/";
             $str = preg_replace_callback('!url\(("|\')?([^\)]+)("|\')?\)!is', array($this, '_replaceCssPath'), $str);
 
             $str = preg_replace('!\/([^\/]*)\/\.\.\/!is','/', $str);
@@ -163,7 +163,7 @@ exit();
         }
 
         function _replaceCssPath($matches) {
-            if(eregi("^(http|\/|\.\/common\/)",$matches[2])) return $matches[0];
+            if(preg_match("/^(http|\/|\.\/common\/)/is",$matches[2])) return $matches[0];
             return sprintf('url(%s%s)', $matches[1], $this->tmp_css_path.$matches[2]);
         }
 
diff --git a/classes/template/TemplateHandler.class.php b/classes/template/TemplateHandler.class.php
index 6807faed0..a1e220be8 100644
--- a/classes/template/TemplateHandler.class.php
+++ b/classes/template/TemplateHandler.class.php
@@ -38,7 +38,7 @@
             if(__DEBUG__==3 ) $start = getMicroTime();
 
             // 변수 체크
-            $tpl_path = ereg_replace('(\/+)$', '', $tpl_path).'/';
+            if(substr($tpl_path,-1)!='/') $tpl_path .= '/';
             if(substr($tpl_filename,-5)!='.html') $tpl_filename .= '.html';
 
             // tpl_file 변수 생성
@@ -145,7 +145,7 @@
             $str1 = $matches[0];
             $str2 = $path = $matches[3];
 
-            if(!eregi("^([a-z0-9\_\.])",$path)) return $str1;
+            if(!preg_match('/^([a-z0-9\_\.])/i',$path)) return $str1;
 
             $path = preg_replace('/^(\.\/|\/)/','',$path);
             $path = '<?php echo $this->tpl_path?>'.$path;
@@ -205,7 +205,7 @@
             $tmp_arr = explode("/", $arg);
             for($i=0;$i<count($tmp_arr);$i++) {
                 $item1 = trim($tmp_arr[$i]);
-                if($item1=='.'||eregi("\.html$",$item1)) continue;
+                if($item1=='.'||substr($item1,-5)=='.html') continue;
 
                 $tmp2_arr = explode(".",$item1);
                 for($j=0;$j<count($tmp2_arr);$j++) {
@@ -260,7 +260,7 @@
             if(!$given_file) return;
 
             // given_file이 lang으로 끝나게 되면 언어팩을 읽도록 함
-            if(ereg('lang$', $given_file)) {
+            if(substr($given_file, -4)=='lang') {
                 if(substr($given_file,0,2)=='./') $given_file = substr($given_file, 2);
                 $lang_dir = sprintf('%s%s', $this->tpl_path, $given_file);
                 if(is_dir($lang_dir)) $output = sprintf('<?php Context::loadLang("%s"); ?>', $lang_dir);
diff --git a/config/config.inc.php b/config/config.inc.php
index 33c7fe0f8..3b38aeae4 100644
--- a/config/config.inc.php
+++ b/config/config.inc.php
@@ -23,7 +23,7 @@
      * 2 : 1 + DB 쿼리
      * 3 : 모든 로그
      **/
-    define('__DEBUG__', 0);
+    define('__DEBUG__', 3);
 
     /**
      * @brief 디버그 메세지의 출력 장소 
diff --git a/modules/blog/blog.admin.controller.php b/modules/blog/blog.admin.controller.php
index e63cab21b..fc37b7fda 100644
--- a/modules/blog/blog.admin.controller.php
+++ b/modules/blog/blog.admin.controller.php
@@ -87,7 +87,7 @@
                     }
 
                     // 이미지 파일이 아니어도 무시
-                    if(!eregi("\.(jpg|jpeg|gif|png)$", $image_obj['name'])) {
+                    if(!preg_match("/\.(jpg|jpeg|gif|png)$/i", $image_obj['name'])) {
                         unset($obj->{$vars->name});
                         continue;
                     }
diff --git a/modules/board/board.admin.controller.php b/modules/board/board.admin.controller.php
index b6aacb503..ddb44761c 100644
--- a/modules/board/board.admin.controller.php
+++ b/modules/board/board.admin.controller.php
@@ -84,7 +84,7 @@
                     }
 
                     // 이미지 파일이 아니어도 무시
-                    if(!eregi("\.(jpg|jpeg|gif|png)$", $image_obj['name'])) {
+                    if(!preg_match("/\.(jpg|jpeg|gif|png)$/i", $image_obj['name'])) {
                         unset($obj->{$vars->name});
                         continue;
                     }
diff --git a/modules/comment/comment.controller.php b/modules/comment/comment.controller.php
index 4242e6406..e9c6bf4ca 100644
--- a/modules/comment/comment.controller.php
+++ b/modules/comment/comment.controller.php
@@ -97,7 +97,7 @@
                 if($oDocument->isLocked()) return new Object(-1,'msg_invalid_request');
 
                 if($obj->password) $obj->password = md5($obj->password);
-                if($obj->homepage &&  !eregi('^http:\/\/',$obj->homepage)) $obj->homepage = 'http://'.$obj->homepage;
+                if($obj->homepage &&  !preg_match('/^http:\/\//i',$obj->homepage)) $obj->homepage = 'http://'.$obj->homepage;
 
                 // 로그인 된 회원일 경우 회원의 정보를 입력
                 if(Context::get('is_logged')) {
@@ -209,7 +209,7 @@
             if(!$is_admin && !$source_obj->isGranted()) return new Object(-1, 'msg_not_permitted');
 
             if($obj->password) $obj->password = md5($obj->password);
-            if($obj->homepage &&  !eregi('^http:\/\/',$obj->homepage)) $obj->homepage = 'http://'.$obj->homepage;
+            if($obj->homepage &&  !preg_match('/^http:\/\//i',$obj->homepage)) $obj->homepage = 'http://'.$obj->homepage;
 
             // 로그인 되어 있고 작성자와 수정자가 동일하면 수정자의 정보를 세팅
             if(Context::get('is_logged')) {
diff --git a/modules/comment/comment.item.php b/modules/comment/comment.item.php
index 5b89f67cd..7b110791c 100644
--- a/modules/comment/comment.item.php
+++ b/modules/comment/comment.item.php
@@ -123,7 +123,7 @@
             $url = trim($this->get('homepage'));
             if(!$url) return;
 
-            if(!eregi("^http:\/\/",$url)) $url = "http://".$url;
+            if(!preg_match("/^http:\/\//i",$url)) $url = "http://".$url;
 
             return $url;
         }
diff --git a/modules/document/document.admin.controller.php b/modules/document/document.admin.controller.php
index 86119db03..56c93d851 100644
--- a/modules/document/document.admin.controller.php
+++ b/modules/document/document.admin.controller.php
@@ -388,7 +388,7 @@
                     if (is_dir($path."/".$entry)) {
                         $this->deleteThumbnailFile($path."/".$entry);
                     } else {
-                        if(!eregi('^thumbnail_([^\.]*)\.jpg$',$entry)) continue;
+                        if(!preg_match('/^thumbnail_([^\.]*)\.jpg$/i',$entry)) continue;
                         @unlink($path.'/'.$entry);
                     }
                 }
diff --git a/modules/document/document.controller.php b/modules/document/document.controller.php
index 8d5593245..83b032f7d 100644
--- a/modules/document/document.controller.php
+++ b/modules/document/document.controller.php
@@ -90,7 +90,7 @@
             if($obj->allow_comment!='Y') $obj->allow_comment = 'N';
             if($obj->lock_comment!='Y') $obj->lock_comment = 'N';
             if($obj->allow_trackback!='Y') $obj->allow_trackback = 'N';
-            if($obj->homepage &&  !eregi('^http:\/\/',$obj->homepage)) $obj->homepage = 'http://'.$obj->homepage;
+            if($obj->homepage &&  !preg_match('/^http:\/\//i',$obj->homepage)) $obj->homepage = 'http://'.$obj->homepage;
             if($obj->notify_message != 'Y') $obj->notify_message = 'N';
 
             // $extra_vars를 serialize
@@ -182,7 +182,7 @@
             if($obj->allow_comment!='Y') $obj->allow_comment = 'N';
             if($obj->lock_comment!='Y') $obj->lock_comment = 'N';
             if($obj->allow_trackback!='Y') $obj->allow_trackback = 'N';
-            if($obj->homepage &&  !eregi('^http:\/\/',$obj->homepage)) $obj->homepage = 'http://'.$obj->homepage;
+            if($obj->homepage &&  !preg_match('/^http:\/\//i',$obj->homepage)) $obj->homepage = 'http://'.$obj->homepage;
             if($obj->notify_message != 'Y') $obj->notify_message = 'N';
 
             // $extra_vars를 serialize
diff --git a/modules/document/document.item.php b/modules/document/document.item.php
index cb71adde2..7770415ab 100644
--- a/modules/document/document.item.php
+++ b/modules/document/document.item.php
@@ -180,7 +180,7 @@
             $url = trim($this->get('homepage'));
             if(!$url) return;
 
-            if(!eregi("^http:\/\/",$url)) $url = "http://".$url;
+            if(!preg_match("/^http:\/\//i",$url)) $url = "http://".$url;
 
             return $url;
         }
@@ -441,7 +441,7 @@
             if(count($file_list)) {
                 foreach($file_list as $file) {
                     if($file->direct_download!='Y') continue;
-                    if(!eregi("(jpg|png|jpeg|gif)$",$file->source_filename)) continue;
+                    if(!preg_match("/(jpg|png|jpeg|gif)$/i",$file->source_filename)) continue;
 
                     $filename = $file->uploaded_filename;
                     if(!file_exists($filename)) continue;
@@ -458,7 +458,7 @@
             preg_match_all("!http:\/\/([^ ^\"^']*?)\.(jpg|png|gif|jpeg)!is", $content, $matches, PREG_SET_ORDER);
             for($i=0;$i<count($matches);$i++) {
                 $src = $matches[$i][0];
-                if(ereg('\/(common|modules|widgets|addons|layouts)\/', $src)) continue;
+                if(preg_match('/\/(common|modules|widgets|addons|layouts)\//i', $src)) continue;
                 else {
                     $target_src = $src; 
                     break;
diff --git a/modules/editor/components/emoticon/emoticon.class.php b/modules/editor/components/emoticon/emoticon.class.php
index 608be572a..73f385417 100644
--- a/modules/editor/components/emoticon/emoticon.class.php
+++ b/modules/editor/components/emoticon/emoticon.class.php
@@ -18,7 +18,7 @@
         function emoticon($editor_sequence, $component_path) {
             $this->editor_sequence = $editor_sequence;
             $this->component_path = $component_path;
-            $this->emoticon_path = sprintf('%s%s/images',eregi_replace('^\.\/','',$this->component_path),'tpl','images');
+            $this->emoticon_path = sprintf('%s%s/images',preg_replace('/^\.\//i','',$this->component_path),'tpl','images');
         }
 
         /**
@@ -26,7 +26,7 @@
          **/
         function getEmoticonList() {
             $emoticon = Context::get('emoticon');
-            if(!$emoticon || !eregi("^([a-z0-9\_]+)$",$emoticon)) return new Object(-1,'msg_invalid_request');
+            if(!$emoticon || !preg_replace("/^([a-z0-9\_]+)$/i",$emoticon)) return new Object(-1,'msg_invalid_request');
 
             $list = $this->getEmoticons($emoticon);
 
@@ -43,7 +43,7 @@
             $oDir = dir($emoticon_path);
             while($file = $oDir->read()) {
                 if(substr($file,0,1)=='.') continue;
-                if(eregi('\.(jpg|jpeg|gif|png)$',$file)) $output[] = sprintf("%s/%s", $path, str_replace($this->emoticon_path,'',$file));
+                if(preg_match('/\.(jpg|jpeg|gif|png)$/i',$file)) $output[] = sprintf("%s/%s", $path, str_replace($this->emoticon_path,'',$file));
             }
             $oDir->close();
             if(count($output)) asort($output);
@@ -91,7 +91,7 @@
             if($alt) {
                 $attr_output[] = "alt=\"".$alt."\"";
             }
-            if(eregi("\.png$",$src)) $attr_output[] = "class=\"iePngFix\"";
+            if(preg_match("/\.png$/i",$src)) $attr_output[] = "class=\"iePngFix\"";
 
             $code = sprintf("<img %s style=\"border:0px\" />", implode(" ",$attr_output));
 
diff --git a/modules/editor/components/image_link/image_link.class.php b/modules/editor/components/image_link/image_link.class.php
index ddfaeb81a..996dde41e 100644
--- a/modules/editor/components/image_link/image_link.class.php
+++ b/modules/editor/components/image_link/image_link.class.php
@@ -66,7 +66,7 @@
             }
             if($align) $attr_output[] = "align=\"".$align."\"";
 
-            if(eregi("\.png$",$src)) $attr_output[] = "class=\"iePngFix\"";
+            if(preg_match("/\.png$/i",$src)) $attr_output[] = "class=\"iePngFix\"";
 
             if($width) $attr_output[] = 'width="'.$width.'"';
             if($height) $attr_output[] = 'height="'.$height.'"';
diff --git a/modules/file/file.controller.php b/modules/file/file.controller.php
index f6936677f..98bbd92ad 100644
--- a/modules/file/file.controller.php
+++ b/modules/file/file.controller.php
@@ -339,7 +339,7 @@
             }
 
             // 이미지인지 기타 파일인지 체크하여 upload path 지정
-            if(eregi("\.(jpg|jpeg|gif|png|wmv|wma|mpg|mpeg|avi|swf|flv|mp3|asaf|wav|asx|midi)$", $file_info['name'])) {
+            if(preg_match("/\.(jpg|jpeg|gif|png|wmv|wma|mpg|mpeg|avi|swf|flv|mp3|asaf|wav|asx|midi)$/i", $file_info['name'])) {
                 $path = sprintf("./files/attach/images/%s/%s/", $module_srl,$upload_target_srl);
                 $filename = $path.$file_info['name'];
                 $direct_download = 'Y';
@@ -474,7 +474,7 @@
                 $old_file = $file_info->uploaded_filename;
 
                 // 이미지인지 기타 파일인지 체크하여 이동할 위치 정함
-                if(eregi("\.(jpg|jpeg|gif|png|wmv|wma|mpg|mpeg|avi|swf|flv|mp3|asaf|wav|asx|midi)$", $file_info->source_filename)) {
+                if(preg_match("/\.(jpg|jpeg|gif|png|wmv|wma|mpg|mpeg|avi|swf|flv|mp3|asaf|wav|asx|midi)$/i", $file_info->source_filename)) {
                     $path = sprintf("./files/attach/images/%s/%s/", $target_module_srl,$target_srl);
                     $new_file = $path.$file_info->source_filename;
                 } else {
diff --git a/modules/guestbook/guestbook.admin.controller.php b/modules/guestbook/guestbook.admin.controller.php
index 780558fc7..c2e935401 100644
--- a/modules/guestbook/guestbook.admin.controller.php
+++ b/modules/guestbook/guestbook.admin.controller.php
@@ -202,7 +202,7 @@
                     }
 
                     // 이미지 파일이 아니어도 무시
-                    if(!eregi("\.(jpg|jpeg|gif|png)$", $image_obj['name'])) {
+                    if(!preg_match("/\.(jpg|jpeg|gif|png)$/i", $image_obj['name'])) {
                         unset($obj->{$vars->name});
                         continue;
                     }
diff --git a/modules/importer/importer.admin.controller.php b/modules/importer/importer.admin.controller.php
index 725ba5c13..0978eceb2 100644
--- a/modules/importer/importer.admin.controller.php
+++ b/modules/importer/importer.admin.controller.php
@@ -55,7 +55,7 @@
             if(!$xml_file) return new Object(-1, 'msg_no_xml_file');
 
             // local 파일 지정인데 파일이 없으면 역시 에러~
-            if(!eregi('^http:',$xml_file) && (!eregi("\.xml$", $xml_file) || !file_exists($xml_file)) ) return new Object(-1,'msg_no_xml_file');
+            if(!preg_match('/^http:/i',$xml_file) && (!preg_match("/\.xml$/i", $xml_file) || !file_exists($xml_file)) ) return new Object(-1,'msg_no_xml_file');
 
             // 이제부터 데이터를 가져오면서 처리
             $fp = $this->getFilePoint($xml_file);
@@ -163,8 +163,8 @@
          **/
         function importMember($obj) {
             // homepage, blog의 url을 정확히 만듬
-            if($obj->homepage && !eregi("^http:\/\/",$obj->homepage)) $obj->homepage = 'http://'.$obj->homepage;
-            if($obj->blog && !eregi("^http:\/\/",$obj->blog)) $obj->blog = 'http://'.$obj->blog;
+            if($obj->homepage && !preg_match("/^http:\/\//i",$obj->homepage)) $obj->homepage = 'http://'.$obj->homepage;
+            if($obj->blog && !preg_match("/^http:\/\//i",$obj->blog)) $obj->blog = 'http://'.$obj->blog;
 
             $obj->email_address = $obj->email;
             list($obj->email_id, $obj->email_host) = explode('@', $obj->email);
@@ -257,7 +257,7 @@
             if(!$xml_file) return new Object(-1, 'msg_no_xml_file');
 
             // local 파일 지정인데 파일이 없으면 역시 에러~
-            if(!eregi('^http:',$xml_file) && (!eregi("\.xml$", $xml_file) || !file_exists($xml_file)) ) return new Object(-1,'msg_no_xml_file');
+            if(!preg_match('/^http:/i',$xml_file) && (!preg_match("/\.xml$/i", $xml_file) || !file_exists($xml_file)) ) return new Object(-1,'msg_no_xml_file');
 
             // 이제부터 데이터를 가져오면서 처리
             $fp = $this->getFilePoint($xml_file);
@@ -398,7 +398,7 @@
             if(!$xml_file) return new Object(-1, 'msg_no_xml_file');
 
             // local 파일 지정인데 파일이 없으면 역시 에러~
-            if(!eregi('^http:',$xml_file) && (!eregi("\.xml$", $xml_file) || !file_exists($xml_file)) ) return new Object(-1,'msg_no_xml_file');
+            if(!preg_match('/^http:/i',$xml_file) && (!preg_match("/\.xml$/i", $xml_file) || !file_exists($xml_file)) ) return new Object(-1,'msg_no_xml_file');
 
             // 필요한 객체 미리 생성
             $this->oDocumentController = &getController('document');
@@ -813,7 +813,7 @@
          **/
         function getFilePoint($filename) {
             $fp = null;
-            if(eregi('^http:', $filename)) {
+            if(preg_match('/^http:/i', $filename)) {
                 $url_info = parse_url($filename);
                 if(!$url_info['port']) $url_info['port'] = 80;
                 if(!$url_info['path']) $url_info['path'] = '/';
@@ -902,7 +902,7 @@
             if(!$xml_file) return new Object(-1, 'msg_no_xml_file');
 
             // local 파일 지정인데 파일이 없으면 역시 에러~
-            if(!eregi('^http:',$xml_file) && (!eregi("\.xml$", $xml_file) || !file_exists($xml_file)) ) return new Object(-1,'msg_no_xml_file');
+            if(!preg_match('/^http:/i',$xml_file) && (!preg_match("/\.xml$/i", $xml_file) || !file_exists($xml_file)) ) return new Object(-1,'msg_no_xml_file');
 
             // 필요한 객체 미리 생성
             $this->oDocumentController = &getController('document');
diff --git a/modules/integration_search/integration_search.admin.controller.php b/modules/integration_search/integration_search.admin.controller.php
index c7f074abd..e536ba756 100644
--- a/modules/integration_search/integration_search.admin.controller.php
+++ b/modules/integration_search/integration_search.admin.controller.php
@@ -78,7 +78,7 @@
                     }
 
                     // 이미지 파일이 아니어도 무시
-                    if(!eregi("\.(jpg|jpeg|gif|png)$", $image_obj['name'])) {
+                    if(!preg_match("/\.(jpg|jpeg|gif|png)$/i", $image_obj['name'])) {
                         unset($obj->{$vars->name});
                         continue;
                     }
diff --git a/modules/layout/layout.admin.controller.php b/modules/layout/layout.admin.controller.php
index 7c4f5612a..d11bb5201 100644
--- a/modules/layout/layout.admin.controller.php
+++ b/modules/layout/layout.admin.controller.php
@@ -93,7 +93,7 @@
                     if(!$image_obj['tmp_name'] || !is_uploaded_file($image_obj['tmp_name'])) continue;
 
                     // 이미지 파일이 아니어도 무시 (swf는 패스~)
-                    if(!eregi("\.(jpg|jpeg|gif|png|swf)$", $image_obj['name'])) continue;
+                    if(!preg_match("/\.(jpg|jpeg|gif|png|swf)$/i", $image_obj['name'])) continue;
 
                     // 경로를 정해서 업로드
                     $path = sprintf("./files/attach/images/%s/", $args->layout_srl);
diff --git a/modules/lifepod/lifepod.admin.controller.php b/modules/lifepod/lifepod.admin.controller.php
index 1db9b73d7..40b9d2434 100644
--- a/modules/lifepod/lifepod.admin.controller.php
+++ b/modules/lifepod/lifepod.admin.controller.php
@@ -200,7 +200,7 @@
                     }
 
                     // 이미지 파일이 아니어도 무시
-                    if(!eregi("\.(jpg|jpeg|gif|png)$", $image_obj['name'])) {
+                    if(!preg_match("/\.(jpg|jpeg|gif|png)$/i", $image_obj['name'])) {
                         unset($obj->{$vars->name});
                         continue;
                     }
diff --git a/modules/member/member.controller.php b/modules/member/member.controller.php
index 288e97e9d..e9d2d8048 100644
--- a/modules/member/member.controller.php
+++ b/modules/member/member.controller.php
@@ -1264,7 +1264,7 @@
             if(!$member_info->member_srl) return;
 
             // 오픈아이디인지 체크 (일단 아이디 형식으로만 결정)
-            if(eregi("^([0-9a-z]+)$", $member_info->user_id)) $member_info->is_openid = false;
+            if(preg_match("/^([0-9a-z]+)$/is", $member_info->user_id)) $member_info->is_openid = false;
             else $member_info->is_openid = true;
 
             // 로그인 처리를 위한 세션 설정
@@ -1330,8 +1330,8 @@
             list($args->email_id, $args->email_host) = explode('@', $args->email_address);
 
             // 홈페이지, 블로그의 주소 검사
-            if($args->homepage && !eregi("^http:\/\/",$args->homepage)) $args->homepage = 'http://'.$args->homepage;
-            if($args->blog && !eregi("^http:\/\/",$args->blog)) $args->blog = 'http://'.$args->blog;
+            if($args->homepage && !preg_match("/^http:\/\//i",$args->homepage)) $args->homepage = 'http://'.$args->homepage;
+            if($args->blog && !preg_match("/^http:\/\//i",$args->blog)) $args->blog = 'http://'.$args->blog;
 
             // 모델 객체 생성
             $oMemberModel = &getModel('member');
@@ -1433,8 +1433,8 @@
             list($args->email_id, $args->email_host) = explode('@', $args->email_address);
 
             // 홈페이지, 블로그의 주소 검사
-            if($args->homepage && !eregi("^http:\/\/",$args->homepage)) $args->homepage = 'http://'.$args->homepage;
-            if($args->blog && !eregi("^http:\/\/",$args->blog)) $args->blog = 'http://'.$args->blog;
+            if($args->homepage && !preg_match("/^http:\/\//is",$args->homepage)) $args->homepage = 'http://'.$args->homepage;
+            if($args->blog && !preg_match("/^http:\/\//is",$args->blog)) $args->blog = 'http://'.$args->blog;
 
             // 아이디, 닉네임, email address 의 중복 체크
             $member_srl = $oMemberModel->getMemberSrlByUserID($args->user_id);
diff --git a/modules/member/member.model.php b/modules/member/member.model.php
index 66f4ee6de..789edce43 100644
--- a/modules/member/member.model.php
+++ b/modules/member/member.model.php
@@ -146,7 +146,7 @@
             unset($info->extra_vars);
             if(!$extra_vars) return $info;
             foreach($extra_vars as $key => $val) {
-                if(eregi('\|\@\|', $val)) $val = explode('|@|', $val);
+                if(preg_match('/\|\@\|/i', $val)) $val = explode('|@|', $val);
                 if(!$info->{$key}) $info->{$key} = $val;
             }
             return $info;
diff --git a/modules/menu/menu.admin.controller.php b/modules/menu/menu.admin.controller.php
index 2b236cab5..5700b0370 100644
--- a/modules/menu/menu.admin.controller.php
+++ b/modules/menu/menu.admin.controller.php
@@ -130,7 +130,7 @@
             $xml_file = $this->makeXmlFile($args->menu_srl);
 
             // url이 mid일 경우 기록 남김 
-            if(eregi('^([a-zA-Z0-9\_\-]+)$', $args->url)) {
+            if(preg_match('/^([a-zA-Z0-9\_\-]+)$/', $args->url)) {
                 $mid = $args->url;
 
                 $mid_args->menu_srl = $args->menu_srl;
@@ -337,7 +337,7 @@
                 $name_str = sprintf('$_names = array(%s); print $_names[$_SESSION["lang_type"]];', $name_arr_str);
 
                 $url = str_replace(array('&','"','<','>'),array('&amp;','&quot;','&lt;','&gt;'),$node->url);
-                if(eregi('^([0-9a-zA-Z\_\-]+)$', $node->url)) $href = getUrl('','mid',$node->url);
+                if(preg_match('/^([0-9a-zA-Z\_\-]+)$/', $node->url)) $href = getUrl('','mid',$node->url);
                 else $href = $url;
                 $open_window = $node->open_window;
                 $expand = $node->expand;
@@ -407,7 +407,7 @@
                 // 변수 정리
                 $href = str_replace(array('&','"','<','>'),array('&amp;','&quot;','&lt;','&gt;'),$node->href);
                 $url = str_replace(array('&','"','<','>'),array('&amp;','&quot;','&lt;','&gt;'),$node->url);
-                if(eregi('^([0-9a-zA-Z\_\-]+)$', $node->url)) $href = getUrl('','mid',$node->url);
+                if(preg_match('/^([0-9a-zA-Z\_\-]+)$/i', $node->url)) $href = getUrl('','mid',$node->url);
                 else $href = $url;
                 $open_window = $node->open_window;
                 $normal_btn = str_replace(array('&','"','<','>'),array('&amp;','&quot;','&lt;','&gt;'),$node->normal_btn);
diff --git a/modules/opage/opage.controller.php b/modules/opage/opage.controller.php
index 6c6c4f64d..d23bb1528 100644
--- a/modules/opage/opage.controller.php
+++ b/modules/opage/opage.controller.php
@@ -85,7 +85,7 @@
 
         function _replaceSrc($matches) {
             $href = $matches[4];
-            if(eregi("^http", $href) || $href == '#' || eregi("javascript:",$href)) return $matches[0];
+            if(preg_match("/^http/i", $href) || $href == '#' || preg_match("/javascript:/i",$href)) return $matches[0];
 
             if(substr($href,0,1)=='/') $href = substr($href,1);
             $href = $this->target_path.$href;
@@ -96,7 +96,7 @@
 
         function _replaceBackgroundUrl($matches) {
             $href = $matches[1];
-            if(eregi("^http",$href) || $href == '#' || eregi("javascript:",$href)) return $matches[0];
+            if(preg_match("/^http/i",$href) || $href == '#' || preg_match("/javascript:/i",$href)) return $matches[0];
 
             if(substr($href,0,1)=='/') $href = substr($href,1);
             $href = $this->target_path.$href;
diff --git a/modules/opage/opage.view.php b/modules/opage/opage.view.php
index a74349507..e14319737 100644
--- a/modules/opage/opage.view.php
+++ b/modules/opage/opage.view.php
@@ -35,7 +35,7 @@
             $cache_file = sprintf("./files/cache/opage/%d.cache.php", $module_info->module_srl);
 
             // http 인지 내부 파일인지 점검
-            if(eregi("^http:\/\/",$path)) $content = $this->getHtmlPage($path, $caching_interval, $cache_file);
+            if(preg_match("/^http:\/\//i",$path)) $content = $this->getHtmlPage($path, $caching_interval, $cache_file);
             else $content = $this->executeFile($path, $caching_interval, $cache_file);
 
             Context::set('opage_content', $content);
@@ -97,7 +97,7 @@
             // 경로와 파일이름을 구함
             $tmp_path = explode('/',$cache_file);
             $filename = $tmp_path[count($tmp_path)-1];
-            $filepath = ereg_replace($filename."$","",$cache_file);
+            $filepath = preg_replace('/'.$filename."$/i","",$cache_file);
 
             // 캐시 검사
             if($caching_interval <1 || !file_exists($cache_file) || filemtime($cache_file) + $caching_interval*60 <= time() || filemtime($cache_file)<filemtime($path) ) {
diff --git a/modules/poll/poll.controller.php b/modules/poll/poll.controller.php
index 1896c69ae..3e75d95c1 100644
--- a/modules/poll/poll.controller.php
+++ b/modules/poll/poll.controller.php
@@ -34,7 +34,7 @@
             $vars = Context::getRequestVars();
             foreach($vars as $key => $val) {
                 if(strpos($key,'tidx')) continue;
-                if(!eregi("^(title|checkcount|item)_", $key)) continue;
+                if(!preg_match("/^(title|checkcount|item)_/i", $key)) continue;
                 if(!trim($val)) continue;
 
                 $tmp_arr = explode('_',$key);
diff --git a/modules/spamfilter/spamfilter.model.php b/modules/spamfilter/spamfilter.model.php
index 424e9045f..2686c977c 100644
--- a/modules/spamfilter/spamfilter.model.php
+++ b/modules/spamfilter/spamfilter.model.php
@@ -78,7 +78,7 @@
             $count = count($word_list);
             for($i=0;$i<$count;$i++) {
                 $word = $word_list[$i]->word;
-                if(eregi($word, $text)!==false) return new Object(-1,sprintf(Context::getLang('msg_alert_denied_word'), $word));
+                if(preg_match('/'.$word.'/is', $text)) return new Object(-1,sprintf(Context::getLang('msg_alert_denied_word'), $word));
             }
 
             return new Object();
diff --git a/modules/springnote/springnote.admin.controller.php b/modules/springnote/springnote.admin.controller.php
index e0204cf33..f16764b5d 100644
--- a/modules/springnote/springnote.admin.controller.php
+++ b/modules/springnote/springnote.admin.controller.php
@@ -200,7 +200,7 @@
                     }
 
                     // 이미지 파일이 아니어도 무시
-                    if(!eregi("\.(jpg|jpeg|gif|png)$", $image_obj['name'])) {
+                    if(!preg_match("/\.(jpg|jpeg|gif|png)$/i", $image_obj['name'])) {
                         unset($obj->{$vars->name});
                         continue;
                     }
diff --git a/modules/trackback/trackback.controller.php b/modules/trackback/trackback.controller.php
index eee40ebf1..4649d5b04 100644
--- a/modules/trackback/trackback.controller.php
+++ b/modules/trackback/trackback.controller.php
@@ -286,7 +286,7 @@
             // 결과를 기다림 (특정 서버의 경우 EOF가 떨어지지 않을 수가 있음
             while(!feof($fp)) {
                 $line = trim(fgets($fp, 4096));
-                if(eregi("^<error>",$line)) break;
+                if(preg_match("/^<error>/i",$line)) break;
             }
 
             // socket 닫음
diff --git a/widgets/rss_reader/rss_reader.class.php b/widgets/rss_reader/rss_reader.class.php
index 1e61bda13..695e5bcc2 100644
--- a/widgets/rss_reader/rss_reader.class.php
+++ b/widgets/rss_reader/rss_reader.class.php
@@ -49,7 +49,7 @@
             fclose($fp); 
 
             $encoding = preg_match("/<\?xml.*encoding=\"(.+)\".*\?>/i", $buff, $matches);
-            if($encoding && !eregi("UTF-8", $matches[1])) $buff = trim(iconv($matches[1]=="ks_c_5601-1987"?"EUC-KR":$matches[1], "UTF-8", $buff));
+            if($encoding && !preg_match("/UTF-8/i", $matches[1])) $buff = trim(iconv($matches[1]=="ks_c_5601-1987"?"EUC-KR":$matches[1], "UTF-8", $buff));
 
             $buff = preg_replace("/<\?xml.*\?>/i", "", $buff);
 
@@ -99,4 +99,4 @@
             return $output;
         }
     }
-?>
\ No newline at end of file
+?>