Laravel APA title case macro

ApaTitle.php

<?php

namespace App\Providers\Macros;

class ApaTitle
{
    public function __invoke()
    {
        return function ($string) {
            // Define minor words to be lowercase
            $minorWords = ['and', 'as', 'but', 'for', 'if', 'nor', 'or', 'so', 'yet', 'a', 'an', 'the', 'as', 'at', 'by', 'for', 'in', 'of', 'off', 'on', 'per', 'to', 'up', 'via'];

            // Split the string into words
            $words = explode(' ', $string);

            // Capitalize the first word
            $words[0] = ucfirst(mb_strtolower($words[0]));

            // Capitalize major words and lowercase minor words
            foreach ($words as $key => $word) {
                // Skip the first word
                if ($key === 0) {
                    continue;
                }

                // Check if the word is a major word or a minor word
                $lowercaseWord = mb_strtolower($word);
                if (in_array($lowercaseWord, $minorWords) && mb_strlen($lowercaseWord) <= 3) {
                    $words[$key] = $lowercaseWord;
                } else {
                    $words[$key] = ucfirst($lowercaseWord);
                }
            }

            // Join the words back into a string
            return implode(' ', $words);
        };
    }
}

ApaTitleStringable.php

<?php

namespace App\Providers\Macros;

use Illuminate\Support\Str;

class ApaTitleStringable
{
    public function __invoke()
    {
        return function () {
            return new static(Str::apaTitle($this->value));
        };
    }
}

AppServiceProvider.php

<?php

namespace App\Providers;

use App\Providers\Macros\ApaTitle;
use App\Providers\Macros\ApaTitleStringable;
use Illuminate\Support\Collection;
use Illuminate\Support\ServiceProvider;
use Illuminate\Support\Str;
use Illuminate\Support\Stringable;

class AppServiceProvider extends ServiceProvider
{
    /**
     * Register any application services.
     */
    public function register(): void
    {
        Collection::make($this->strMacros())
            ->reject(fn($class, $macro) => Str::hasMacro($macro))
            ->each(fn($class, $macro) => Str::macro($macro, app($class)()));

        Collection::make($this->stringableMacros())
            ->reject(fn($class, $macro) => Stringable::hasMacro($macro))
            ->each(fn($class, $macro) => Stringable::macro($macro, app($class)()));
    }

    /**
     * Bootstrap any application services.
     */
    public function boot(): void
    {

    }

    protected function strMacros(): array
    {
        return [
            'apaTitle' => ApaTitle::class,
        ];
    }

    protected function stringableMacros(): array
    {
        return [
            'apaTitle' => ApaTitleStringable::class,
        ];
    }
}