Why does the bot sometimes not respond?

Question

PHP

Hello.
There is a chat bot on VK, written in PHP, ~10k requests per day, which is negligible for a server.
Sometimes I monitor unread messages and see that about 1 out of 1k requests are either not processed or not sent at all.
Why can't I see the error - because the last error was at 16:12, and CallbackAPI logging starts only at 21:45, that is, about 30-40 of the last requests are shown there.
The php logs are absolutely empty when error_reporting is set to E_ALL and display_errors = false.
Can VK simply not cope with requests and not send a request to the server?

Answer 1

You send a message using the messages.send method, it may return an error, log these errors and then you will find out the reason.