pluckWithKey.php

<?php

use Illuminate\Support\Collection;

if (! Collection::hasMacro('pluckWithKey')) {
    /*
     * Keeps the key from the original array while plucking the value from the child array.
     * Useful for pulling keyed config form the config files
     *
     * Example: If you have this:
     *
     * $services = [
     *     'service1' => ['name' => 'Service 1', 'url' => 'http://something.com'],
     *     'service2' => ['name' => 'Service 2', 'url' => 'http://somethingelse.com'],
     * ]
     *
     * And you run
     *
     * collect($services)->pluckWithKey('name');
     *
     * It will return:
     *
     * [
     *      'service1' => 'Service 1',
     *      'service2' => 'Service 2',
     * ]
     *
     *
     * @param string $valueKey
     *
     * @return array
     */
    Collection::macro('pluckWithKey', function ($valueKey) {

        return $this->map(function($item) use ($valueKey){
            return array_key_exists($valueKey, $item) ? $item[$valueKey] : null;
        });
    });
}