rafael.php

<?php

require 'vendor/autoload.php';

use MonadPHP\ListMonad;
use MonadPHP\Maybe;

function index($key) {
    return function ($arr) use ($key) {
        return isset($arr[$key]) ? $arr[$key] : null;
    };
}

$photos = [
    ['member' => ['name' => 'Igor']],
    ['member' => ['name' => 'Rafael']],
    ['random' => 'garbage'],
    ['member' => ['more' => 'random garbage']],
];

$photos = new ListMonad($photos);
$names = $photos
    ->bind(MonadPHP\Maybe::unit)
    ->bind(index('member'))
    ->bind(index('name'))
    ->extract();

var_dump(array_filter($names));