create a helper on laravel code example

Example 1: add custom helper laravel

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

Example 2: laravel helper

use Illuminate\Support\Str;

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

// 7