wordpress高级搜索，WordPress按分类搜索功能制作

<form id="searchform" name="searchform" method="get" action="<?php bloginfo('home'); ?>/" >
<ul>
<li>
<p>
<?php $select = wp_dropdown_categories('class=search_select&show_option_all=全站搜索&orderby=name&hierarchical=0&selected=-1&depth=1');?>
</p>
</li>
<li>
<input type="text" name="s" id="s" maxlength="34" value=""/>
</li>
<li>
<input type="submit" value="搜 索" />
</li>
</ul>
</form>

.search_select{height:35px;line-height:35px;width:180px}
.sck{height:33px;width:528px;border:1px solid #999;padding:0 10px;background:#FFF;font-size:16px;}
.sckal{height:34px;width:100px;border:1px solid #999;line-height:34px;text-align:center; background-color:#36F;color:#FFF;font-size:15px;font-weight:bold}

<div>
<form id="index_search" name="index_search" method="get" action="<?php bloginfo('home’); ?>/">
<p><input type="text" name="s" id="s" value=""/> <input type="submit" value=" 搜 索 " /></p>
<p>
<label for="s_type5" style="width:50px"><input type="radio" name="cat" id="cat" value="all" checked>全站</label>
<label for="s_type1" style="width:50px"><input type="radio" name="cat" id="cat" value="4" checked>主题</label>
<label for="s_type2" style="width:50px"><input type="radio" name="cat" id="cat" value="6">插件</label>
<label for="s_type3" style="width:50px"><input type="radio" name="cat" id="cat" value="3">主机</label>
<label for="s_type4" style="width:50px"><input type="radio" name="cat" id="cat" value="10">经验</label>
</p>
</form>
</div>

<form action="<?php bloginfo('home'); ?>" method="get">
<div>
<input type="text" value="<?php echo wp_specialchars($s, 1); ?>" name="s" id="s" />
<select style="" name="cat" class="search-option">
<option value="4" selected="selected">宝贝</option>
<option value="2">问答</option>
<option value="3">品牌</option>
</select>
<input type="submit" id="searchsubmit" value="Search" />
</div>
</form>