MadelineProto now offers a simple broadcast API, that can be used to asynchronously broadcast messages to all users of a bot or userbot in the background, without incurring in timeouts or other issues.

Note that unlike the bot API, MadelineProto can be used to fetch the full list of users, chats and channels of a normal bot, simply using its bot token.

Here's a simple example, explaining how to broadcast a message and a photo to every user of a bot:

<?php
if (!file_exists('madeline.php')) {
    copy('https://phar.madelineproto.xyz/madeline.php', 'madeline.php');
}
include 'madeline.php';

$MadelineProto = new \danog\MadelineProto\API('bot.madeline');

// Works OK with both bots and userbots
$MadelineProto->start();

$id = $MadelineProto->broadcastMessages([
    ['message' => 'This broadcast is powered by @MadelineProto!'],
    ['message' => 'This media broadcast is powered by @MadelineProto!', 'media' => [
        '_' => 'inputMediaUploadedPhoto',
        'file' => 'https://docs.madelineproto.xyz/logo-hover.png'
    ]],
]);

You can also forward messages:

// Send messages, showing the "Forwarded from" header
$id = $MadelineProto->broadcastForwardMessages(
    from_peer: 101374607,
    ids: [1, 2, 3, 4],
    drop_author: false,
);

// Send messages WITHOUT showing the "Forwarded from" header
$id = $MadelineProto->broadcastForwardMessages(
    from_peer: 101374607,
    ids: [1, 2, 3, 4],
    drop_author: true,
);

The methods return an integer ID that can be used to:

- Get the current broadcast progress with getBroadcastProgress
- Cancel the broadcast using cancelBroadcast

Note that to avoid manually polling the progress, MadelineProto will also periodically emit updateBroadcastProgress updates to the event handler, containing a Progress object for all broadcasts currently in-progress.

Filtering is also available, as well as support for custom broadcast actions.

See here » for a full example of the broadcast API, and here » for the full documentation.