thinkPHP コントローラーの変数をテンプレートで表示する方法

public function register() {
  $type = I("param.type");//1.学生注册 2.教师注册 3.其他注册
  $this -> assign("type", $type);
    //q全部部门
  $depart1 = M("Depart") -> where("status=1 and fid=0") -> order("id asc") -> select();
  $this -> assign("depart1", $depart1);
  $this -> display();
}

<php>
  echo $i;
</php

<font color="red">注意：1.非相关人员，严禁注册。{$i}</font><br>
<php>
  $logined = is_array($_SESSION[&#39;userInfo&#39;]) ? "" : "hide-p";
  $unlogined = $logined == "hide-p" ? "" : "hide-p";
</php>
<p id="unlogined-p" class="{$unlogined}">

<if condition="$type neq 4">
  <p class="form-group">
    <label for="" class="control-label col-sm-3">一级部门: <span class="text-danger">*</span></label>
    <p class="col-sm-9">
      <select name="depart1_id" id="depart1_id" onchange="depart1change()" class="form-control input-sm">
        <option value="-1">-----请选择一级部门-----</option>
        <foreach name="depart1" item="vo">
          <option value="{$vo.id}">{$vo.name}</option>
        </foreach>
      </select>
    </p>
  </p>
  <p class="form-group">
    <label for="" class="control-label col-sm-3">二级部门: <span class="text-danger">*</span></label>
    <p class="col-sm-9">
      <select name="depart2_id" id="depart2_id" onchange="depart2change()" class="form-control input-sm">
        <option selected=&#39;selected&#39;>-----请先选择一级部门-----</option>
      </select>
    </p>
  </p>
  <p class="form-group">
    <label for="" class="control-label col-sm-3">三级部门: <span class="text-danger">*</span></label>
    <p class="col-sm-9">
      <select name="depart3_id" id="depart3_id" class="form-control input-sm">
        <option selected=&#39;selected&#39;>-----请先选择二级部门-----</option>
      </select>
    </p>
  </p>
</if>