Blade 是 Laravel 所提供的一个简单且强大的模板引擎。相较于其它知名的 PHP 模板引擎，Blade 并不会限制说你必须得在视图中使用 PHP 代码。所有 Blade 视图都会被编译缓存成普通的 PHP 代码，一直到它们被更改为止。这代表 Blade 基本不会对你的应用程序生成负担。Blade 视图文件使用 .blade.php 做为扩展名，通常保存于 resources/views 文件夹内。
# 定义页面布局
使用 Blade 模板的两个主要优点为 模板继承 与 区块。让我们先通过一个简单的例子来上手。首先，我们需要确认一下「主要的」页面布局。大多数的网页应用程序在不同页面都保持着相同的布局方式，这种布局在这单个 Blade 视图中可以很方便的定义：
我们先构建一个基础页面模版,因为后面的每个页面都是需要继承它的.创建 master.blade.php文件.
<!-- 文件保存于 resources/views/master.blade.php --><!DOCTYPE html><html lang="en"><head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1"> <title> @yield('title') </title> <link rel="stylesheet" href="http://cdn.bootcss.com/bootstrap/3.3.4/css/bootstrap.min.css"></head><body><nav class="navbar navbar-default"> <div class="container"> <div class="navbar-header"> <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1"> <span class="sr-only">Toggle Navigation</span> <span class="icon-bar"></span> <span class="icon-bar"></span> <span class="icon-bar"></span> </button> @if(Auth::guest()) <a class="navbar-brand" href="/">学生成绩管理</a> @else @if (Auth::user()->is_admin) <a class="navbar-brand" href="/admin">学生成绩管理</a> @else <a class="navbar-brand" href="/">学生成绩管理</a> @endif @endif </div> <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1"> <ul class="nav navbar-nav"> <li><a href="http://www.golaravel.com" target="__blank">Power by laravel5</a></li> </ul> <ul class="nav navbar-nav navbar-right"> @if (Auth::guest()) @else <li class="dropdown"> <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-expanded="false">{{ Auth::user()->name }} <span class="caret"></span></a> <ul class="dropdown-menu" role="menu"> <li><a href="{{ url('/logout') }}">退出</a></li> </ul> </li> @endif </ul> </div> </div></nav><!-- <div>{{-- <!-- @include('flash') --}} </div> -->@yield('content') <!-- script --><script src="http://cdn.bootcss.com/jquery/1.11.2/jquery.min.js"></script><script src="http://cdn.bootcss.com/bootstrap/3.3.4/js/bootstrap.min.js"></script></body></html> 如你所见，这个文件包含了传统的 HTML 语法。不过，请注意 @section 与 @yield 命令。正如其名，@section 命令定义一个内容区块，而 @yield 命令被用来 “显示指定区块” 的内容。
@yield()[可以简单地理解为区域】 和 @extends() 通常会结合者使用，实现我们通常所说的layouts布局。layouts布局就是在web开发的过程中，我们将一些公用的部分如 header ， footer等直接放在一个视图文件中，然后在使用的使用直接继承 (使用@extends) 就可以了，比如我们在 resources/views/ 文件夹之下创建一个 master.blade.php ：
现在，我们已经定义好了这个应用程序的布局，让我们接着来定义一个继承此布局的子页面。
#继承页面布局
当正在定义子页面时，你可以使用 Blade 的 @extends 命令指定子页面应该「继承」哪一个布局。当视图 @extends Blade 的布局之后，即可使用 @section 命令将内容注入于布局的区块中。切记，如上述例子所见，这些区块的内容都会使用@yield 显示在布局中：
welcome欢迎首页面继承主页面
<!-- 文件保存于 resources/views/welcome.blade.php -->@extends('master') {{-- 继承master模版，注意：此处米有结束符分号 --}}@section('title') {{-- 对应@yield('title') --}} {{-- 也可以这样写：@section('title', '页面标题') --}} 学生成绩管理系统-测试-@stop@section('content') {{-- 对应@yield('content') --}} <div class="container"> <div class="jumbotron"> <h2 id="div-nbsp-class-quote-nbsp-Inspiring-quote-nbsp-div"><div class="quote">{{ Inspiring::quote() }}</div></h2> <p>同学们登录后先修改相关资料</p> <p>查询分数,有疑问咨询管理员</p> <p><a class="btn btn-primary btn-lg" href="/login" role="button">点击登录</a></p> </div> </div>@stop
@section 有两种写法：
第一种当内容比较短时可以直接写，结尾不用@stop结束符
@section('title', '页面标题') 第二种当显示内容比较多时，可以分开来写，即下面这种：
@section('content') // 这部分替换app里的代码，有开始就会有结束，所以一个section 对应一个stop <h1 id="生如夏花之绚烂">生如夏花之绚烂</h1> <p>死如秋叶之静美</p>@stop 浏览器端显示：
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