Hello .. need some help please I have a telegram bot

Question

Hello .. need some help please I have a telegram bot

written in php ..
Usually in normal web pages it is easy to get error messages to debug app using
ini_set('display_errors....
the problem is that this is not possible in telegram bots as requests are coming from telegram servers

so my question is :

is there any way to save error messages into a variable or array ?
so that I can easily send them as a normal telegram message