问答项目---处理待解决/已回答/高悬赏/零回答！

<ul class=‘ans-sel‘>
    <li <if condition=‘$filter eq 0‘>class=‘on‘</if>>
        <a href="{:U(‘index‘,array(‘id‘=>$cateid))}">待解决问题</a>
    </li>
    <li <if condition=‘$filter eq 1‘>class=‘on‘</if>>
        <a href="{:U(‘index‘,array(‘id‘=>$cateid,‘filter‘=>1))}">已解决</a>
    </li>
    <li <if condition=‘$filter eq 2‘>class=‘on‘</if>>
        <a href="{:U(‘index‘,array(‘id‘=>$cateid,‘filter‘=>2))}">高悬赏</a>
    </li>
    <li class=‘last <if condition="$filter eq 3">on</if>‘>
        <a href="{:U(‘index‘,array(‘id‘=>$cateid,‘filter‘=>3))}">零回答</a>
    </li>
</ul>

//组合筛选条件 
$filter = I(‘get.filter‘,‘‘,‘intval‘);           
$filter = isset($filter) ? $filter : 0; 
switch($filter){
    case 1:
        $wwhere[‘solve‘] = 1;
    break;
    case 2:
        $wwhere[‘reward‘] = array(‘GT‘,0);
    break;
    case 3:
        $wwhere[‘answer‘] = 0;
    break;
    default :
        $wwhere[‘solve‘] = 0;
}