twig模板引擎模板无法继承？

Question

{% extends "layout.html" %}

{% block content %}
<!-- 内容主体区域 -->
<form class="layui-form" action="/index/save" method="post">
    <div class="layui-form-item">
        <label class="layui-form-label">标题</label>
        <div class="layui-input-block">
            <input type="text" name="title" required lay-verify="required" placeholder="请输入标题" autocomplete="off"
                   class="layui-input">
        </div>
    </div>
    <div class="layui-form-item layui-form-text">
        <label class="layui-form-label">内容</label>
        <div class="layui-input-block">
            <textarea name="desc" placeholder="请输入内容" class="layui-textarea"></textarea>
        </div>
    </div>
    <div class="layui-form-item">
        <div class="layui-input-block">
            <button class="layui-btn" lay-submit lay-filter="formDemo">立即提交</button>
            <button type="reset" class="layui-btn layui-btn-primary">重置</button>
        </div>
    </div>
</form>
</div>
{% endblock %}

Answer 1

建议参照官方指引