how to use helper function in laravel code example

Example 1: how to share a helper globally laravel

php artisan make:provider HelperServiceProvider

Example 2: laravel helper functions

$callback = function ($value) {
    return (is_numeric($value)) ? $value * 2 : 0;
};

$result = with(5, $callback);

// 10

$result = with(null, $callback);

// 0

$result = with(5, null);

// 5

Example 3: laravel helper

use Illuminate\Support\Str;

$length = Str::length('Laravel');

// 7

Example 4: how to share a helper globally laravel

<?php
function getDomesticCities()
{
$result = \App\Package::where('type', '=', 'domestic')
    ->groupBy('from_city')
    ->get(['from_city']);

return $result;
}