아이프레임 삽입 질문입니다.

+++++++++++++++++++++++++++++++++++++++function conv_content($content, $html) {     global $config, $board, $member, $view;     if ($html)     {         $source = array();         $target = array();         $source[] = "//";         $target[] = "";         if ($html == 2) { // 자동 줄바꿈             $source[] = "/\n/";             $target[] = "<br/>";         }                 // 테이블 태그의 갯수를 세어 테이블이 깨지지 않도록 한다.         $table_begin_count = substr_count(strtolower($content), "<table");         $table_end_count = substr_count(strtolower($content), "</table");         for ($i=$table_end_count; $i<$table_begin_count; $i++)         {             $content .= "</table>";         }         $content = preg_replace($source, $target, $content);         $adm=is_admin($view[mb_id]);         if ($adm != 'super' && $adm != 'group')  $content = bad_tag_convert($content);         // XSS (Cross Site script) 막기         // 완벽한 XSS 방지는 없다.         // 081022 : CSRF 방지         //$content = preg_replace("/(on)(abort|blur|change|click|dblclick|dragdrop|error|focus|keydown|keypress|keyup|load|mousedown|mousemove|mouseout|mouseover|mouseup|mouseenter|mouseleave|move|reset|resize|select|submit|unload)/i", "$1<!-- XSS Filter -->$2", $content);         //$content = preg_replace("/(on)([^\=]+)/i", "&#111;&#110;$2", $content);         if ($adm != 'super' && $adm != 'group') $content = preg_replace("/(on)([a-z]+)([^a-z]*)(\=)/i", "&#111;&#110;$2$3$4", $content);         $content = preg_replace("/(dy)(nsrc)/i", "&#100;&#121;$2", $content);         $content = preg_replace("/(lo)(wsrc)/i", "&#108;&#111;$2", $content);         if ($adm != 'super' && $adm != 'group') $content = preg_replace("/(sc)(ript)/i", "&#115;&#99;$2", $content);         $content = preg_replace("/(ex)(pression)/i", "e&#120;$2", $content);             }     else // text 이면     {         // & 처리 : &amp; &nbsp; 등의 코드를 정상 출력함         $content = html_symbol($content);         // 공백 처리 //$content = preg_replace("/  /", "&nbsp; ", $content); $content = str_replace("  ", "&nbsp; ", $content); $content = str_replace("\n ", "\n&nbsp;", $content);         $content = get_text($content, 1);         $content = url_auto_link($content);     }     return $content; } +++++++++++++++++++++++++++++++++++++++여기까지