創(chuàng)建app/Helpers/helpers.php 文件並定義函數(shù)如formatPrice、isActiveRoute 和uploadImage；2. 在composer.json 的autoload.files 中添加helpers.php 路徑；3. 運(yùn)行composer dump-autoload 使函數(shù)全局可用；4. 在視圖、控制器等任意位置使用這些函數(shù)；5. 若功能增多可拆分多個(gè)輔助文件並註冊到autoload.files；6. 遵循最佳實(shí)踐避免邏輯複雜化和命名衝突，最終實(shí)現(xiàn)簡單高效的全局函數(shù)復(fù)用。

Creating custom helper functions in Laravel is a simple and effective way to reuse common logic across your application. Here's how you can do it properly.

1. Create a Custom Helpers File

Laravel doesn't restrict where you put helper functions, but the common practice is to create a dedicated file for them.

• Navigate to the app/Helpers directory (create it if it doesn't exist).
• Create a new PHP file, eg, helpers.php .

 app/
└── Helpers/
    └── helpers.php

Now, add your custom functions inside helpers.php :

 <?php

// app/Helpers/helpers.php

function formatPrice($amount)
{
    return &#39;$&#39; . number_format($amount, 2);
}

function isActiveRoute($routeName)
{
    return request()->routeIs($routeName) ? &#39;active&#39; : &#39;&#39;;
}

function uploadImage($file, $folder = &#39;images&#39;)
{
    return $file->store($folder, &#39;public&#39;);
}

?? These functions are global, so avoid naming conflicts (eg, don't use names like request() or config() ).

2. Autoload the Helpers File with Composer

To make Laravel load your helper functions automatically, you need to tell Composer to include the file.

Open composer.json and locate the autoload section. Update it like this:

 "autoload": {
    "psr-4": {
        "App\\": "app/"
    },
    "files": [
        "app/Helpers/helpers.php"
    ]
}

After updating composer.json , run:

 composer dump-autoload

This command regenerates the autoloader and includes your helper file in every request.

3. Using the Helper Functions

Now you can use your custom functions anywhere in your app — in views, controllers, Blade templates, or routes.

In a Blade template:

 <p>Total: {{ formatPrice(99.99) }}</p>
<li class="{{ isActiveRoute(&#39;home&#39;) }}">Home</li>

In a controller:

 use Illuminate\Http\Request;

class ProductController extends Controller
{
    public function store(Request $request)
    {
        $path = uploadImage($request->file('image'), 'products');
        // Save $path to database
    }
}

Optional: Organize Helpers into Multiple Files

If your app grows, consider splitting helpers into multiple files (eg, string_helpers.php , file_helpers.php ).

Just add each file to the files array in composer.json :

 "files": [
    "app/Helpers/helpers.php",
    "app/Helpers/string_helpers.php",
    "app/Helpers/file_helpers.php"
]

And run composer dump-autoload again.

Best Practices

• Avoid overusing helpers — if logic is complex or involves business rules, use services or classes instead.
• Keep function names clear and unique.
• Don't put Laravel-specific logic (like DB queries) directly in helpers unless they're truly reusable.
• Consider type hints and return types for better maintainability.

That's it. Custom helpers in Laravel are easy to set up and handy for small, reusable utilities. Just create the file, autoload it, and start using your functions. Basically, it boils down to one file and one Composer tweak.

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