What would you recommend for conferencing?

Question

PHP

What would you recommend for conferencing?

1. free
2. easy to install and use
3 mobile version of android and ios
4. large number of participants from 100

Answer 1

1. Cookies will not be set if there was already an output (tags, empty lines, spaces, text, etc.)
2. They will get into the $_COOKIE global variable only on the next hit (after page reload)
Proof
PS and read about sql- injections...