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
<?phpnamespace App\Http\Controllers;use Illuminate\Http\Request;Class Home extends Controller{public function index(){echo '这是home中的index方法';}public function php(Request $request){echo '这是home中的php方法';$data['name'] = $request->name;return view('test',$data);}}
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
<?phpnamespace App\Http\Controllers;use Illuminate\Http\Request;Class Home extends Controller{public function index(){echo '这是home中的index方法';}public function php(Request $request){echo '这是home中的php方法';$data['name'] = $request->name;return view('test',$data);}}
视图：test.blade.php
<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>测试视图</title></head><body><a href="http://www.php.cn"><h2>php中文网{{$name}}</h2></a></body></html>
路由：web.php
<?phpuse Illuminate\Support\Facades\Route;Route::get('/', function () {return view('welcome');});Route::get('/home.hop','Home@php');
三、blade语法：if 、witch 和 变量
- 变量：
视图：test.blade.php
<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>测试视图</title></head><body><div>用户名：{{$username}}</div><div>账号：{{$zh}}</div><div>密码：{{$mm}}</div><div>地址：{{$dz}}</div><div>国家：{!!$gj!!}</div><a href="http://www.php.cn"><h2>php中文网{{$name}}</h2></a></body></html>
控制器：Home.php
<?phpnamespace App\Http\Controllers;use Illuminate\Http\Request;Class Home extends Controller{public function index(){echo '这是home中的index方法';}public function php(Request $request){echo '这是home中的php方法';$data['name'] = $request->name;$data['username'] = '<script>alert("admin");</script>';$data['zh'] = '156320';$data['mm'] = 'dasnfld';$data['dz'] = '山西省临汾市';$data['gj'] = '<sapn style="color:red">中国</span>';return view('test',$data);}}
路由：web.php
<?phpuse Illuminate\Support\Facades\Route;Route::get('/', function () {return view('welcome');});Route::get('/home.hop','Home@php');
- if：
如果用户名存在就显示出来，不存在就显示登录
视图：test.blade.php
<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>测试视图</title></head><body><div>@if($username)用户名：{{$username}}@else<a href="">登录</a>@endif</div><div>账号：{{$zh}}</div><div>密码：{{$mm}}</div><div>地址：{{$dz}}</div><div>国家：{!!$gj!!}</div><a href="http://www.php.cn"><h2>php中文网{{$name}}</h2></a></body></html>
控制器：Home.php
<?phpnamespace App\Http\Controllers;use Illuminate\Http\Request;Class Home extends Controller{public function index(){echo '这是home中的index方法';}public function php(Request $request){echo '这是home中的php方法';$data['name'] = $request->name;//不存在就显示登录//$data['username'] = '';//存在就显示用户名$data['username'] = 'admin';$data['zh'] = '156320';$data['mm'] = 'dasnfld';$data['dz'] = '山西省临汾市';$data['gj'] = '<sapn style="color:red">中国</span>';return view('test',$data);}}
- 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
<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>测试视图</title></head><body><div>@if($username)用户名：{{$username}}@else<a href="">登录</a>@endif</div><div>账号：{{$zh}}</div><div>@switch($age)@case(17)<div style="color:red;">未成年</div>@break@case(18)<div style="color:green;">刚成年</div>@break@case(30)<div style="color:yellow;">老男人</div>@break@default<div>不知道</div>@endswitch</div><div>地址：{{$dz}}</div><div>国家：{!!$gj!!}</div><a href="http://www.php.cn"><h2>php中文网{{$name}}</h2></a></body></html>
控制器：Home.php
<?phpnamespace App\Http\Controllers;use Illuminate\Http\Request;Class Home extends Controller{public function index(){echo '这是home中的index方法';}public function php(Request $request){echo '这是home中的php方法';$data['name'] = $request->name;$data['username'] = 'admin';$data['zh'] = '156320';$data['age'] = '18';$data['dz'] = '山西省临汾市';$data['gj'] = '<sapn style="color:red">中国</span>';return view('test',$data);}}
