# [laravel]自訂Helper
###### tags: `laravel`

參考資料:
https://tutsforweb.com/creating-helpers-laravel/

## 新建AppHelper
app\Helpers\AppHelper.php

<?php

function ttt(){
    return 'ttt';
}

## 修改composer.json
composer.json

{
    "name": "laravel/laravel",


    //...
    "autoload": {
    //加上這段
        "files": [
            "app/Helpers/AppHelper.php"
        ],
    //加上這段
        "psr-4": {
            "App\\": "app/"
        },
        "classmap": [
            "database/seeds",
            "database/factories"
        ]
    },
    //...
}

## 執行composer dump-autoload

$ composer dump-autoload

以後在AppHelper.php的所有function就可以被全域呼叫了.

---
若是將Helper寫成class也行:

<?php
class AppHelper{
  public static function ttt(){
    return 'ttt';
  }
}

在controller跟Model呼叫Helper class:

//要加這句引用
use App\Helpers\AppHelper;

...
    AppHelper::ttt();

在blade中呼叫Helper class:
https://stackoverflow.com/questions/34710626/php-laravel-use-helper-class-in-all-views

{!! App\Helpers\AppHelper::ttt() !!}

>若helper裡只有function不需如此麻煩,直接呼叫function name即可.