Laravel collection macro to transpose form data extracted from Refactoring to Collections book

transposing_form_input.php

<?php

/* Transpose Macro */
Collection::macro('transpose', function () {
    $items = array_map(function (...$items) {
        return $items;
    }, ...$this->values());

    return new static($items);
});

/ * Usage Example */
class ContactController
{
    /* ... */

    public function store (Request $request) {
        collect($request->only('names', 'emails', 'occupations'))
            ->transpose()
            ->map(function ($contactData) {
                return new Contact([
                    'name' => $contactData[0],
                    'email' => $contactData[1],
                    'occupation' => $contactData[2],
                ]);
            })
            ->each(function ($contact) {
                Auth::user()->contacts()->save($contact);
            });
    
        return redirect()->home();
    }

    /* ... */
}