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Laravel路由、控制器和模板引擎语法
王佳祥
Original
801 people have browsed it

Laravel路由、控制器和模板引擎语法

一、控制器创建

  • 手动方式：

在app\Http\Controllers目录下创建自定义的控制器

  1.   <?php
  2. namespace App\Http\Controllers;
  3. use Illuminate\Http\Request;
  5. Class Home extends Controller{
  6.     public function index(){
  7.         echo '这是home中的index方法';
  8.     }
  9.     public function php(Request $request){
  10.         echo '这是home中的php方法';
  11.         $data['name'] = $request->name;
  12.         return view('test',$data);
  13.     }
  14. }

控制器名与类名一致

  • 命令行方式：

打开命令行,进入本地的laravel的根目录输入以下命令：

php artisan make:controller 控制器名

二、控制器向视图传值

控制器：Home.php

  1. <?php
  2. namespace App\Http\Controllers;
  3. use Illuminate\Http\Request;
  5. Class Home extends Controller{
  6.     public function index(){
  7.         echo '这是home中的index方法';
  8.     }
  9.     public function php(Request $request){
  10.         echo '这是home中的php方法';
  11.         $data['name'] = $request->name;
  12.         return view('test',$data);
  13.     }
  14. }

视图：test.blade.php

  1. <!DOCTYPE html>
  2. <html lang="en">
  3. <head>
  4.     <meta charset="UTF-8">
  5.     <meta name="viewport" content="width=device-width, initial-scale=1.0">
  6.     <title>测试视图</title>
  7. </head>
  8. <body>
  9.     <a href="http://www.php.cn"><h2>php中文网{{$name}}</h2></a>
  10. </body>
  11. </html>

路由：web.php

  1. <?php
  2. use Illuminate\Support\Facades\Route;
  3. Route::get('/', function () {
  4.     return view('welcome');
  5. });
  6. Route::get('/home.hop','Home@php');

三、blade语法：if 、witch 和 变量

  • 变量：

视图：test.blade.php

  1. <!DOCTYPE html>
  2. <html lang="en">
  3. <head>
  4.     <meta charset="UTF-8">
  5.     <meta name="viewport" content="width=device-width, initial-scale=1.0">
  6.     <title>测试视图</title>
  7. </head>
  8. <body>
  9.     <div>用户名：{{$username}}</div>
  10.     <div>账号：{{$zh}}</div>
  11.     <div>密码：{{$mm}}</div>
  12.     <div>地址：{{$dz}}</div>
  13.     <div>国家：{!!$gj!!}</div>
  14.     <a href="http://www.php.cn"><h2>php中文网{{$name}}</h2></a>
  15. </body>
  16. </html>

控制器：Home.php

  1. <?php
  2. namespace App\Http\Controllers;
  3. use Illuminate\Http\Request;
  5. Class Home extends Controller{
  6.     public function index(){
  7.         echo '这是home中的index方法';
  8.     }
  9.     public function php(Request $request){
  10.         echo '这是home中的php方法';
  11.         $data['name'] = $request->name;
  12.         $data['username'] = '<script>alert("admin");</script>';
  13.         $data['zh'] = '156320';
  14.         $data['mm'] = 'dasnfld';
  15.         $data['dz'] = '山西省临汾市';
  16.         $data['gj'] = '<sapn style="color:red">中国</span>';
  17.         return view('test',$data);
  18.     }
  19. }

路由：web.php

  1. <?php
  2. use Illuminate\Support\Facades\Route;
  3. Route::get('/', function () {
  4.     return view('welcome');
  5. });
  6. Route::get('/home.hop','Home@php');

  • if：

如果用户名存在就显示出来，不存在就显示登录

视图：test.blade.php

  1. <!DOCTYPE html>
  2. <html lang="en">
  3. <head>
  4.     <meta charset="UTF-8">
  5.     <meta name="viewport" content="width=device-width, initial-scale=1.0">
  6.     <title>测试视图</title>
  7. </head>
  8. <body>
  9.     <div>
  10.         @if($username)
  11.         用户名：{{$username}}
  12.         @else
  13.         <a href="">登录</a>
  14.         @endif
  15.     </div>
  16.     <div>账号：{{$zh}}</div>
  17.     <div>密码：{{$mm}}</div>
  18.     <div>地址：{{$dz}}</div>
  19.     <div>国家：{!!$gj!!}</div>
  20.     <a href="http://www.php.cn"><h2>php中文网{{$name}}</h2></a>
  21. </body>
  22. </html>

控制器：Home.php

  1. <?php
  2. namespace App\Http\Controllers;
  3. use Illuminate\Http\Request;
  5. Class Home extends Controller{
  6.     public function index(){
  7.         echo '这是home中的index方法';
  8.     }
  9.     public function php(Request $request){
  10.         echo '这是home中的php方法';
  11.         $data['name'] = $request->name;
  12.         //不存在就显示登录
  13.         //$data['username'] = '';
  14.         //存在就显示用户名
  15.         $data['username'] = 'admin';
  16.         $data['zh'] = '156320';
  17.         $data['mm'] = 'dasnfld';
  18.         $data['dz'] = '山西省临汾市';
  19.         $data['gj'] = '<sapn style="color:red">中国</span>';
  20.         return view('test',$data);
  21.     }
  22. }

  • witch:

年龄匹配到17，显示未成年；匹配到18显示刚成年；匹配到30显示老男人

视图：test.blade.php

  1. <!DOCTYPE html>
  2. <html lang="en">
  3. <head>
  4.     <meta charset="UTF-8">
  5.     <meta name="viewport" content="width=device-width, initial-scale=1.0">
  6.     <title>测试视图</title>
  7. </head>
  8. <body>
  9.     <div>
  10.         @if($username)
  11.         用户名：{{$username}}
  12.         @else
  13.         <a href="">登录</a>
  14.         @endif
  15.     </div>
  16.     <div>账号：{{$zh}}</div>
  17.     <div>
  18.         @switch($age)
  19.         @case(17)
  20.         <div style="color:red;">未成年</div>
  21.         @break
  22.         @case(18)
  23.         <div style="color:green;">刚成年</div>
  24.         @break
  25.         @case(30)
  26.         <div style="color:yellow;">老男人</div>
  27.         @break
  28.         @default
  29.         <div>不知道</div>
  30.         @endswitch
  31.     </div>
  32.     <div>地址：{{$dz}}</div>
  33.     <div>国家：{!!$gj!!}</div>
  34.     <a href="http://www.php.cn"><h2>php中文网{{$name}}</h2></a>
  35. </body>
  36. </html>

控制器：Home.php

  1. <?php
  2. namespace App\Http\Controllers;
  3. use Illuminate\Http\Request;
  5. Class Home extends Controller{
  6.     public function index(){
  7.         echo '这是home中的index方法';
  8.     }
  9.     public function php(Request $request){
  10.         echo '这是home中的php方法';
  11.         $data['name'] = $request->name;
  12.         $data['username'] = 'admin';
  13.         $data['zh'] = '156320';
  14.         $data['age'] = '18';
  15.         $data['dz'] = '山西省临汾市';
  16.         $data['gj'] = '<sapn style="color:red">中国</span>';
  17.         return view('test',$data);
  18.     }
  19. }

Correcting teacher：天蓬老师天蓬老师

Correction status：qualified

Teacher's comments：相当的用心
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