그누보드5 게시판 내 필드검색

<!-- 게시판 검색 시작 { --><fieldset id="bo_sch" class="well well-sm text-center">    <form name="fsearch" method="get" class="form-inline">    <input type="hidden" name="bo_table" value="<?php echo $bo_table ?>">    <input type="hidden" name="sca" value="<?php echo $sca ?>">    <input type="hidden" name="sop" value="and">	<select name="sfl" id="sfl"  class="input-sm form-control" style="margin:5px 0px;">        <option value="wr_subject"<?php echo get_selected($sfl, 'wr_subject', true); ?>>제목</option>        <option value="wr_content"<?php echo get_selected($sfl, 'wr_content'); ?>>내용</option>        <option value="wr_subject||wr_content"<?php echo get_selected($sfl, 'wr_subject||wr_content'); ?>>제목+내용</option>        <option value="mb_id,1"<?php echo get_selected($sfl, 'mb_id,1'); ?>>회원아이디</option>        <option value="mb_id,0"<?php echo get_selected($sfl, 'mb_id,0'); ?>>회원아이디(코)</option>        <option value="wr_name,1"<?php echo get_selected($sfl, 'wr_name,1'); ?>>글쓴이</option>        <option value="wr_name,0"<?php echo get_selected($sfl, 'wr_name,0'); ?>>글쓴이(코)</option>		<option value="wr_2,1"<?php echo get_selected($sfl, 'wr_2,1'); ?>>주소</option>    </select>	<div class="input-group" style="margin:5px 0px;">          <input type="text" name="stx" value="<?php echo stripslashes($stx) ?>" required id="stx" class="input-sm form-control required" size="30" maxlength="30" placeholder="검색어를 입력하세요">          <div class="input-group-btn">            <button type="submit"  class="btn btn-default btn-sm">검색</button>		  </div>        </div>    </form></fieldset><!-- } 게시판 검색 끝 -->