How to Create Custom Helper Functions in Laravel

How to create custom helper functions in Laravel

Create a helpers.php file in your app folder and load it up with composer:

"autoload": {
    "classmap": [
        ...
    ],
    "psr-4": {
        "App\\": "app/"
    },
    "files": [
        "app/helpers.php" // <---- ADD THIS
    ]
},

After adding that to your composer.json file, run the following command:

composer dump-autoload

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If you don't like keeping your helpers.php file in your app directory (because it's not a PSR-4 namespaced class file), you can do what the laravel.com website does: store the helpers.php in the bootstrap directory. Remember to set it in your composer.json file:

"files": [
    "bootstrap/helpers.php"
]

Creating a custom helper in own package in laravel

Could not solve it by composer independently and used my package service provider.
I added this code to the boot() method of my FaviconServiceProvider and it works now:

if (File::exists(__DIR__ . '\app\helpers.php')) {
            require __DIR__ . '\app\helpers.php';
        }

How to make a custom helper function, available in every controller for Laravel 5

First create the required function inside the app directory within a .php file as

helpers.php

if (!function_exists('getServices')) {
    public function getServices() {
        return DB::table('services')->get();
    }
}

and include this file in composer.json inside autoload/files array as

composer.json

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

Then update the composer, now you can able to directly use the created function inside your whole project as the file is automatically loaded when application get bootstraped

$result = getServices();

Custom helper classes in Laravel 5.4

I don't think it's possible to use only function when you have code in your classes. Well, you could try with extending Blade but it's too much.

What you should do is creating one extra file, for example app\Helpers\helpers.php and in your composer.json file put:

"autoload": {
    "classmap": [
        "database"
    ],
    "psr-4": {
        "App\\": "app/"
    },
    "files": ["app/Helpers/helpers.php"] // <- this line was added
},

create app/Helpers/helpers.php file and run

composer dump-autoload

Now in your app/Helpers/helpers.php file you could add those custom functions for example like this:

if (! function_exists('fooBar')) {
   function fooBar() 
   {
      return \App\Helpers\CustomHelper::fooBar();
   }
}

so you define global functions but in fact all of them might use specific public methods from some classes.

By the way this is exactly what Laravel does for its own helpers for example:

if (! function_exists('array_add')) {
    function array_add($array, $key, $value)
    {
        return Arr::add($array, $key, $value);
    }
}

as you see array_add is only shorter (or maybe less verbose) way of writing Arr::add

Helper Function In Laravel

You should load the other files within the autoload field.

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

https://getcomposer.org/doc/04-schema.md#files

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