Vk Callback saving information?

Question

PHP

Good afternoon. When writing a chat bot for VK using callback api, the question arose "How best to save data between steps". That is, a person writes something in messages and you need to check this information at the next step of the bot. I tried to write information to a file, but it's too slow while writing while reading...

Answer 1

For example, create an object / variable, which will temporarily record the necessary info