Laravel 5框架学习之向视图传送数据，laravel框架
Laravel 5框架学习之向视图传送数据，laravel框架
我们在Routes.php中新建一个路由
复制代码 代码如下:
Route::get('about', 'PagesController@about');
在浏览器中浏览会获得一个错误，错误信息仅仅是一个提示信息，缺少细节，在生产环境 It' ok，但是开发阶段我们希望获得详细信息。
在项目的根目录找到 .env 文件，修改
复制代码 代码如下:
APP_DEBUG=true
这将显示详细的错误信息，PagesController 不存在。但在生产环境一定要设置为 false
我们可以手工新建控制器，但更快的方式是利用 laravel 提供的生成器。在命令行当前项目目录中运行：
复制代码 代码如下:
php artisan
可以看到laravel提供的功能。
复制代码 代码如下:
php artisan make:controller PagesController
ok，在 app->http->controller 下面生成了 PagesController.php
<?php namespace App\Http\Controllers;
use App\Http\Requests;
use App\Http\Controllers\Controller;
use Illuminate\Http\Request;
class PagesController extends Controller {
/**
* Display a listing of the resource.
*
* @return Response
*/
public function index()
{
//
}
/**
* Show the form for creating a new resource.
*
* @return Response
*/
public function create()
{
//
}
/**
* Store a newly created resource in storage.
*
* @return Response
*/
public function store()
{
//
}
/**
* Display the specified resource.
*
* @param int $id
* @return Response
*/
public function show($id)
{
//
}
/**
* Show the form for editing the specified resource.
*
* @param int $id
* @return Response
*/
public function edit($id)
{
//
}
/**
* Update the specified resource in storage.
*
* @param int $id
* @return Response
*/
public function update($id)
{
//
}
/**
* Remove the specified resource from storage.
*
* @param int $id
* @return Response
*/
public function destroy($id)
{
//
}
}
这样生成的controller包含了全部所需要的RESTful方法，我们可以简化一下。删除生成的PagesController.php，在命令行运行：
复制代码 代码如下:
php artisan make:controller PagesController --plain
再看一下生成的结果
复制代码 代码如下:
use App\Http\Requests;
use App\Http\Controllers\Controller;
use Illuminate\Http\Request;
class PagesController extends Controller {
//
}
基本上是一个空的controller，所有的方法我们需要自己创建。
如果你想知道到底有什么参数我们可以在命令行执行，你可以运行下面的命令来查看帮助
复制代码 代码如下:
php artisan help make:controller
ok, 你可以经常使用help命令来帮助你了解这些参数。
在PagesController中建立about方法。
复制代码 代码如下:
public function about() {
return 'About Page';
}
在浏览器冲查看结果，错误消失，返回简单的信息。
返回视图
我们当然希望返回html文档，修改about方法的返回：
复制代码 代码如下:
public function about() {
return view('pages.about');
}
注意：返回的结果是 pages.about ，这表示在 views 子目录中的 pages 子目录中的 about.balde.php 文件。让我们创建 resources\views\pages\about.balde.php 文件
复制代码 代码如下:
About
That's it. 运行浏览器查看吧，😄
向视图传送数据
修改PagesController.php
复制代码 代码如下:
public function about() {
$name = 'Zhang Jinlgin';
return view('pages.about')->with('name', $name);
}
修改我们的视图文件 about.blade.php
复制代码 代码如下:
About
Bingo，查看结果吧。
我们使用的laravel使用了blade模板，我们可以利用这个好处修改视图：
复制代码 代码如下:
About {{ $name }}
看起来更好了，在blade中，{{}}是转义html的语义的，让我来修改一个数据：
复制代码 代码如下:
$name = 'Zhang Jinlgin';
查看结果，发现所有的html元素都被转义了。但是如果不需要转义html，可以使用 {!! !!}，修改视图：
复制代码 代码如下:
About {!! $name !!}
再看结果，👌
以上所述就是本文的全部内容了，希望能够对大家熟练掌握Laravel5有所帮助。
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