view() 函数

1.view() 函数的第二个参数可穿变量，可以以数组的形式一次传多个变量：

class ViewController extends Controller
{
    public function index()
    {
        $name = 'zhouyi';
        $age = 25;
        return view('my_laravel', ['name' => $name, 'age' => $age]);
    }
}

2. 变量存在与否的两种处理方式

• PHP 原生处理方法

<div class="title m-b-md">
                <?= isset($name)?$name:'XXX' ?>
                   {{$name}} <!-- use @ to cover -->
                   <?= $age ?> is not true!
                </div>

• .blade 处理方法

<div class="title m-b-md">
                   {{isset($name)?$name:'aaa'}} <!-- use @ to cover -->
                   <?= $age ?> is not true!
                </div>

3.解析js代码

• 定义变量str

public function index()
    {
        
        $str = '<script>document.write("My Laravel")</script>';
        return view('my_laravel', ['str' => $str]);
    }

• 解析str

 <div class="title m-b-md">
                   {!!$str!!} 
 </div>