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父模板 base.html

<block name='a'>abc</block>

<block name='1'>123</block>

<block name='啊'>啊啊啊</block>

子模板 111.html

{extend name="base" /}

{block name="a"}{/block}

{block name="1"}456{/block}

{block name="啊"}{__block__}引用后的新内容{/block}

布局模板 layout.html

{include file="public/header" /}
{__CONTENT__}

{include file="public/footer" /}

add.html

主题内容

namespace app\index\controller;use think\Controller;

class User extends Controller{
    public function add()
    {
         return $this->view->engine->layout(true)->fetch('index\add');

        
    }