用法：1、dd()函數(shù)用于打印出給定的變量和結(jié)束腳本的運(yùn)行，語法為“dd(變量)”；2、asset()函數(shù)用于引入靜態(tài)文件，生成一個(gè)url，語法為“asset(文件路徑)”；3、“base_path()”函數(shù)用于獲取項(xiàng)目根目錄路徑。

本教程操作環(huán)境：windows10系統(tǒng)、Laravel6版，DELL G3電腦。

laravel輔助函數(shù)的用法有哪些

laravel中一些輔助函數(shù)

1.dd()，打印函數(shù)

//輔助函數(shù)     public function help()     {         dd('test');    打印test，相當(dāng)于dump()+die()，不會(huì)執(zhí)行后面的return         return 123;     }

2.數(shù)組操作Arr，要引入IlluminateSupportArr

//輔助函數(shù)     public function help()     {         $data = Arr::collapse([[1,2,3],[4,5,6]]);         return $data;    //輸出 [1,2,3,4,5,6]    合并數(shù)組     }   //輔助函數(shù)     public function help()     {         $data = ['a'=>1, 'b'=>2];         $data = Arr::except($data, ['a']);         return $data;    //輸出 ["b":2]    刪除某個(gè)鍵值     }

3.app_path()，獲取app路徑

//輔助函數(shù)     public function help()     {         $data = app_path();         return $data;     }

4.base_path()，獲取項(xiàng)目根目錄路徑

//輔助函數(shù)     public function help()     {         $data = base_path();         return $data;     }

5.config_path()，獲取config路徑

//輔助函數(shù)     public function help()     {         $data = config_path();         return $data;     }

6.database_path()，獲取database路徑

//輔助函數(shù)     public function help()     {         $data = database_path();         return $data;     }

7.public_path()，獲取public路徑

//輔助函數(shù)     public function help()     {         $data = public_path();         return $data;     }

8字符串操作Str，要引入IlluminateSupportStr

//輔助函數(shù)     public function help()     {         $data = Str::after('today is sunday','is');         return $data;    //輸出 sunday    獲取某個(gè)字符串之后的字符串     }   //輔助函數(shù)     public function help()     {         $data = Str::before('today is sunday','is');         return $data;    //輸出 today    獲取某個(gè)字符串之前的字符串     }   //輔助函數(shù)     public function help()     {         $data = Str::between('today is sunday','today','sunday');         return $data;    //輸出 is    返回之間的字符串     }   //輔助函數(shù)     public function help()     {         $data = Str::contains('today is sunday');         return $data;    //輸出 true    判斷是否存在某個(gè)字符串     }   //輔助函數(shù)     public function help()     {         $data = Str::endsWith('today is sunday', 'y');         return $data;    //輸出 true    判斷以某個(gè)字符串結(jié)尾     }   //輔助函數(shù)     public function help()     {         $data = Str::length('today is sunday');         return $data;    //輸出 15    字符串長度     }   //輔助函數(shù)     public function help()     {         dd(Str::limit('today is sunday',8));    //打印 today is...     }   //輔助函數(shù)     public function help()     {         dd(Str::lower('TODAY is sunday',8));    //轉(zhuǎn)換小寫     }   //輔助函數(shù)     public function help()     {         dd(Str::random());    //隨機(jī)字符串     }   //輔助函數(shù)     public function help()     {         dd(Str::of('today is sunday')->append(', happy'));    //鏈?zhǔn)讲僮?，追?    }   //輔助函數(shù)     public function help()     {         dd(Str::of('today is sunday')->before('sunday'));    //鏈?zhǔn)讲僮?，返回字符串之前的字符?    }

9.action()，生成url

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

10.asset()，生成url

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

11.env()，獲取環(huán)境配置

//輔助函數(shù)     public function help()     {         $data = env('APP_ENV');         return $data;     }

12.info()，打印日志

//輔助函數(shù)     public function help()     {         $data = info('this is a test log info');    //向storage/logs/laravel.log中插入一條日志         return $data;     }

13.redirect()，跳轉(zhuǎn)路由

//輔助函數(shù)     public function help()     {         redirect('/');     }

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