Functions should be called with no spaces between the function name, the opening parenthesis, and the first parameter; spaces between commas and each parameter, and no space between the last parameter, the closing parenthesis, and the semicolon. Here's an example:
$var = foo($bar, $baz, $quux);
maybe a more generic addChatID() would be more future proof?
generally it seems that alot of methods do pretty much the same just using different strings. Maybe you could base these methods all from a common method. Just for future ease of development.