communication Socket and I/O mechanism between PHP and Node.js

I heard that Node.js is doing much better on socket and I/O mechanism over native Php. PHP is usually run as a module — weren’t really built with persistent connection in mind

Could you make an example on TCP/IP socket (http) to tell different method approach and performance to implement it on nodejs and php ? and also heard nodejs is non-block I/O mechanizm and can create multi process or thread over PHP. Why PHP apache system could not create mutli thread ? Please assist to clarify those terminology meaning when reading articles