tp在视图输出if判断

<if condition="($name eq 1) OR ($name gt 100) "> 
value1
<elseif condition="$name eq 2"/>
value2
<else /> 
value3
</if>
例：
<if condition="($order_data['type'] eq 2) && ($order_data['status'] eq 1) "> 
    <h3>订单已支付</h3>
<elseif condition="($order_data['type'] eq 3) && ($order_data['status'] eq 1)"/>
    <h3>订单待配送</h3>
</if>
<if condition="!isset($_SESSION['mark'])">
                <textarea placeholder="如有特殊要求,请备注" id="mark"></textarea>
            <else />
                   <textarea placeholder="如有特殊要求,请备注" id="mark">{$Think.session.mark}</textarea>
            </if>