What are the uses of laravel helper functions?

Usage: 1. The dd() function is used to print out the given variables and end the running of the script. The syntax is "dd(variable)"; 2. The asset() function is used to introduce static files and generate A url, the syntax is "asset (file path)"; 3. The "base_path()" function is used to obtain the project root directory path.

The operating environment of this tutorial: Windows 10 system, Laravel 6 version, DELL G3 computer.

What are the usages of laravel auxiliary functions

Some auxiliary functions in laravel

1.dd(), printing function

//辅助函数
    public function help()
    {
        dd('test');    打印test，相当于dump()+die()，不会执行后面的return
        return 123;
    }

2.Array operation Arr , to introduce Illuminate\Support\Arr

//辅助函数
    public function help()
    {
        $data = Arr::collapse([[1,2,3],[4,5,6]]);
        return $data;    //输出 [1,2,3,4,5,6]    合并数组
    }
 
//辅助函数
    public function help()
    {
        $data = ['a'=>1, 'b'=>2];
        $data = Arr::except($data, ['a']);
        return $data;    //输出 ["b":2]    删除某个键值
    }

3.app_path(), get the app path

//辅助函数
    public function help()
    {
        $data = app_path();
        return $data;
    }

4.base_path(), get the project root directory path

//辅助函数
    public function help()
    {
        $data = base_path();
        return $data;
    }

5 .config_path(), get the config path

//辅助函数
    public function help()
    {
        $data = config_path();
        return $data;
    }

6.database_path(), get the database path

//辅助函数
    public function help()
    {
        $data = database_path();
        return $data;
    }

7.public_path(), get the public path

//辅助函数
    public function help()
    {
        $data = public_path();
        return $data;
    }

8 string To operate Str, introduce Illuminate\Support\Str

//辅助函数
    public function help()
    {
        $data = Str::after('today is sunday','is');
        return $data;    //输出 sunday    获取某个字符串之后的字符串
    }
 
//辅助函数
    public function help()
    {
        $data = Str::before('today is sunday','is');
        return $data;    //输出 today    获取某个字符串之前的字符串
    }
 
//辅助函数
    public function help()
    {
        $data = Str::between('today is sunday','today','sunday');
        return $data;    //输出 is    返回之间的字符串
    }
 
//辅助函数
    public function help()
    {
        $data = Str::contains('today is sunday');
        return $data;    //输出 true    判断是否存在某个字符串
    }
 
//辅助函数
    public function help()
    {
        $data = Str::endsWith('today is sunday', 'y');
        return $data;    //输出 true    判断以某个字符串结尾
    }
 
//辅助函数
    public function help()
    {
        $data = Str::length('today is sunday');
        return $data;    //输出 15    字符串长度
    }
 
//辅助函数
    public function help()
    {
        dd(Str::limit('today is sunday',8));    //打印 today is...
    }
 
//辅助函数
    public function help()
    {
        dd(Str::lower('TODAY is sunday',8));    //转换小写
    }
 
//辅助函数
    public function help()
    {
        dd(Str::random());    //随机字符串
    }
 
//辅助函数
    public function help()
    {
        dd(Str::of('today is sunday')->append(', happy'));    //链式操作，追加
    }
 
//辅助函数
    public function help()
    {
        dd(Str::of('today is sunday')->before('sunday'));    //链式操作，返回字符串之前的字符串
    }

9.action(), generate url

//辅助函数
    public function help()
    {
        $url = action([HomeController::class, 'index']);
        return $url;
    }

10.asset(), and generate url

//辅助函数
    public function help()
    {
        $url = asset('img/abc.jpg');
        return $url;
    }

11.env (), get environment configuration

//辅助函数
    public function help()
    {
        $data = env('APP_ENV');
        return $data;
    }

12.info(), print log

//辅助函数
    public function help()
    {
        $data = info('this is a test log info');    //向storage/logs/laravel.log中插入一条日志
        return $data;
    }

13.redirect(), jump route

//辅助函数
    public function help()
    {
        redirect('/');
    }

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