<in><else/></in>判断域名使用<in>标签

<in  name='_SERVER["SERVER_NAME"]'  value=' '>
<li>
<input type="text" name="address" class="register-input" placeholder="1">
</li>
<else/>
<li>
<input type="text" name="referrer" class="register-input" placeholder="2">
</li>
</in>