1:1문의 비회원도 쓸 수 있을까요?

<?phpinclude_once('./_common.php'); if($is_guest)    alert('회원이시라면 로그인 후 이용해 보십시오.', './login.php?url='.urlencode(G5_BBS_URL.'/qalist.php')); $qaconfig = get_qa_config(); $g5['title'] = $qaconfig['qa_title'];include_once('./qahead.php'); $skin_file = $qa_skin_path.'/list.skin.php'; $category_option = '';if ($qaconfig['qa_category']) {    $category_href = G5_BBS_URL.'/qalist.php';     $category_option .= '<li><a href="'.$category_href.'"';    if ($sca=='')        $category_option .= ' id="bo_cate_on"';    $category_option .= '>전체</a></li>';     $categories = explode('|', $qaconfig['qa_category']); // 구분자가 | 로 되어 있음    for ($i=0; $i<count($categories); $i++) {        $category = trim($categories[$i]);        if ($category=='') continue;        $category_msg = '';        $category_option .= '<li><a href="'.($category_href."?sca=".urlencode($category)).'"';        if ($category==$sca) { // 현재 선택된 카테고리라면            $category_option .= ' id="bo_cate_on"';            $category_msg = '<span class="sound_only">열린 분류 </span>';        }        $category_option .= '>'.$category_msg.$category.'</a></li>';    }} if(is_file($skin_file)) {    $sql_common = " from {$g5['qa_content_table']} ";    $sql_search = " where qa_type = '0' ";     if(!$is_admin)        $sql_search .= " and mb_id = '{$member['mb_id']}' ";     if($sca) {        if (preg_match("/[a-zA-Z]/", $sca))            $sql_search .= " and INSTR(LOWER(qa_category), LOWER('$sca')) > 0 ";        else            $sql_search .= " and INSTR(qa_category, '$sca') > 0 ";    }     $stx = trim($stx);    if($stx) {        if (preg_match("/[a-zA-Z]/", $stx))            $sql_search .= " and ( INSTR(LOWER(qa_subject), LOWER('$stx')) > 0 or INSTR(LOWER(qa_content), LOWER('$stx')) > 0 )";        else            $sql_search .= " and ( INSTR(qa_subject, '$stx') > 0 or INSTR(qa_content, '$stx') > 0 ) ";    }     $sql_order = " order by qa_num ";     $sql = " select count(*) as cnt                $sql_common                $sql_search ";    $row = sql_fetch($sql);    $total_count = $row['cnt'];     $page_rows = G5_IS_MOBILE ? $qaconfig['qa_mobile_page_rows'] : $qaconfig['qa_page_rows'];    $total_page  = ceil($total_count / $page_rows);  // 전체 페이지 계산    if ($page < 1) { $page = 1; } // 페이지가 없으면 첫 페이지 (1 페이지)    $from_record = ($page - 1) * $page_rows; // 시작 열을 구함     $sql = " select *                $sql_common                $sql_search                $sql_order                limit $from_record, $page_rows ";    $result = sql_query($sql);     $list = array();    $num = $total_count - ($page - 1) * $page_rows;    $subject_len = G5_IS_MOBILE ? $qaconfig['qa_mobile_subject_len'] : $qaconfig['qa_subject_len'];    for($i=0; $row=sql_fetch_array($result); $i++) {        $list[$i] = $row;         $list[$i]['category'] = get_text($row['qa_category']);        $list[$i]['subject'] = conv_subject($row['qa_subject'], $subject_len, '…');        if ($stx) {            $list[$i]['subject'] = search_font($stx, $list[$i]['subject']);        }         $list[$i]['view_href'] = G5_BBS_URL.'/qaview.php?qa_id='.$row['qa_id'].$qstr;         $list[$i]['icon_file'] = '';        if(trim($row['qa_file1']) || trim($row['qa_file2']))            $list[$i]['icon_file'] = '<img src="'.$qa_skin_url.'/img/icon_file.gif">';         $list[$i]['name'] = get_text($row['qa_name']);        $list[$i]['date'] = substr($row['qa_datetime'], 2, 8);         $list[$i]['num'] = $num - $i;    }     $is_checkbox = false;    $admin_href = '';    if($is_admin) {        $is_checkbox = true;        $admin_href = G5_ADMIN_URL.'/qa_config.php';    }     $list_href = G5_BBS_URL.'/qalist.php';    $write_href = G5_BBS_URL.'/qawrite.php';     $list_pages = preg_replace('/(\.php)(&amp;|&)/i', '$1?', get_paging(G5_IS_MOBILE ? $qaconfig['qa_mobile_page_rows'] : $qaconfig['qa_page_rows'], $page, $total_page, './qalist.php'.$qstr.'&amp;page='));     $stx = get_text(stripslashes($stx));    include_once($skin_file);} else {    echo '<div>'.str_replace(G5_PATH.'/', '', $skin_file).'이 존재하지 않습니다.</div>';} include_once('./qatail.php');?>