The pwrtelegram API can now delete messages (for real!).
To delete a message sent by the bot or any other user in any private chat or group, just use the new deleteMessages method: it accepts two parameters;

chat_id - The id of the chat where to delete the messages
ids - a json array containing the ids of the messages to delete.

This will work for messages sent by other users in groups too, if the bot is admin.
A small example with curl:

curl https://API.pwrtelegram.xyz/bottoken/deleteMessages -F chat_id=-1008382957 -F 'ids=[28374, 28735]'

Join @pwrtelegramgroup for support!

How did I accomplish this you may ask?
I simply used my MTProto client, Daniil.it/MadelineProto: with it you can do EVERYTHING (and I mean EVERYTHING, even create secret chats and make phone calls) official clients can do, from a simple script!

The pwrtelegram API is now extremely fast and won't be down anymore!
You can safely implement it into your bots now :D

Unfortunately, telegram patched that bug, but you can still delete messages in private chats and groups (not supergroups)!

Telegram's next update will include several improvements and new features, like round video messages: thanks to my new bot, @jsondumpbetabot, I've found out that their file ids will have id 13, and I have already added basic support for them in MadelineProto!
https://github.com/danog/MadelineProto/blob/master/src/danog/MadelineProto/TL_botAPI.tl

The next update of the bot API will allow bots to read the language code of users (only if they have already started it, it won't work for forwarded messages); this feature is already present in the pwrtelegram.xyz API: the getChat method will return the language code of the user.

You can now delete messages from supergroups/channels again!

Farsi users may now join the official farsi group: https://t.me/joinchat/AAAAAERlsQpmK-BGZlGZ9A
We also have an international group: @pwrtelegramgroup
An italian group: @pwrtelegramgroupita
And a russian group: @pwrtelegramgrouprus

گروه برای کابران فارسی ساخته شد
عضو شوید
https://t.me/joinchat/AAAAAERlsQpmK-BGZlGZ9A

گروه عمومی @pwrtelegramgroup

An italian group: @pwrtelegramgroupita
And a russian group: @pwrtelegramgrouprus

The PWRTelegram API now runs on a powerful new server with 64 gb of ram, as usual generously offered by flo :3 ❤️❤️❤️

#coolpwrstuff
To obtain the member list of any group/supergroup/channel as a bot, simply run the getChat method as a bot: the parameters are the exactly the ones you must use in the official bot API, for the result see daniil.it/MadelineProto/Chat.html

#coolpwrstuff
To send mentions by user id, even for users that do not have a username, use the following syntax:
https://api.pwrtelegram.xyz/botTOKEN/sendmessage

Parameters:

chat_id=id
text=<a href="mention:101374607">HEY YOU</a>
parse_mode=HTML
mtproto=true

HEY YOU

It's been more than a year since I created pwrtelegram, and the above can still be said :D
During this year of activity pwrtelegram has evolved to become s fully fledged telegram client, based on https://Github.com/danog/MadelineProto?v=new
It can now execute mtproto methods (the ones all official clients use to interact with telegram), either as a user, or as a bot (see pwrtelegram.xyz for info on how to do that, and Daniil.it/MadelineProto/API_docs/methods/ for the full method list).
It is being used by a LOT of users, directly through the API or indirectly through the bots using the API.
I'm amazed by the success of this single-dev project.
Thank you all again, for everything.
P.S. I see telegram is testing the deleteMessage method (yet again, copycats xd), but since it isn't working for all bots, I suggest you use the much faster deleteMessages method of the pwrtelegram API, since it can delete up to a billion messages with a single API call (and no, it is not running a foreach loop internally: the mtproto methods used to delete messages already accept an array of message ids, the official bot API is simply, as usual, limiting the power of the MTProto API).

I forgot to say that the API is extremely fast now :DDDDDDDDDDDDD

Bugs I found in PHP so far:
https://bugs.php.net/bug.php?id=74545
https://bugs.php.net/bug.php?id=74586

The last bug is also a very serious memory leak :D:

Check out my PHP prime factorization extension, https://github.com/danog/PrimeModule-ext
It can factorize semiprimes up to 2^63-1, even on 32 bit systems, at incredible speeds.
You can use it together with its OOP wrapper, https://github.com/danog/PrimeModule

Check out https://github.com/danog/MagicalSerializer
It's an awesome library that allows you to easily serialize built-in PHP classes (like Threaded, Volatile, PDO, and so on) or classes that extend them!

You can now delete service messages with the deleteMessages method!

MadelineProto is always a step ahead of the bot API, for example, it can already call the payment methods:
http://daniil.it/MadelineProto/API_docs/methods/payments_clearSavedInfo.html
http://daniil.it/MadelineProto/API_docs/methods/payments_getPaymentForm.html
http://daniil.it/MadelineProto/API_docs/methods/payments_getPaymentReceipt.html
http://daniil.it/MadelineProto/API_docs/methods/payments_getSavedInfo.html
http://daniil.it/MadelineProto/API_docs/methods/payments_sendPaymentForm.html
http://daniil.it/MadelineProto/API_docs/methods/payments_validateRequestedInfo.html

There are lots of other methods that are not enabled in any official client yet, for the full list see https://daniil.it/MadelineProto/API_docs/methods
Some of these methods may not work on the main servers, but will work on the testing servers, use the config found in .env.calls to access them.