User - discord-php/DiscordPHP GitHub Wiki
Users are part of Bot client. See Member for Guild Member object.
use Discord\Parts\User\User;A user is a general discord user that is not attached to a guild.
Your BOT must share Guild with the User
Change 123123123123123123 below with the User ID you want to retrieve
Cached, synchronous (i.e. loadAllMembers option is true):
$user = $discord->users->get('id', '123123123123123123');Cached User can be also retrieved from related objects:
- 
Application $user = $application->user;the application owner
- 
Ban $user = $ban->user;the banned user
- 
Audit Log Entry $user = $entry->user;user who made the changes
- 
Guild $user = $guild->owner;the guild owner
- 
Invite $user = $invite->inviter;user who created the invite
- 
Member $user = $member->user;user of the member
- 
Message $user = $message->author;author of the message
- 
Webhook $user = $webhook->user;user who created the webhook
If the code above returns null, you may need to fetch it first (Promise, synchronous):
$discord->users->fetch('123123123123123123')->then(function (User $user) {
    // ...
})->done();