3v4l.org

run code in 300+ PHP versions simultaneously

@ 2018-06-19T19:17:47Z

<?php
class Notification
{
    public $is_notifyable;
    public $children = [];
}

function mergeNotifications(Notification ... $notifications) : array
{
    $result = [];

    foreach ($notifications as $notification) {
        // Can no longer be "empty"
        // if (empty($notification)) continue;

        // is_notifyable is now a promise that your interface made:
        if ($notification->is_notifyable) {
            $result[] = $notification;
        }
        else
        {
            // flatten the notifications recursively:
            foreach(mergeNotifications(...$notification->children) as $child)
            {
                $result[] = $child;
            }
        }
    }
    
    return $result;
}

$arr = [
    new Notification(),
    new Notification(),
];

var_dump(mergeNotifications(...$arr));

Output for 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6: array(0) { }
Output for 8.3.5: Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 array(0) { }

preferences:dark modelive preview

157.55 ms | 402 KiB | 162 Q