One of the biggest laments of PHP is that it does not have a dedicated web server and instead relies on an external program like Apache or NGINX to handle the incoming request. Modern versions of PHP do ship with a development server, but that server is not recommended for production use at all. This is not just because it is normally single-connection only (though there are flags to make it multi-threaded) but because there are better tools to handle the web serving—like Apache and NGINX. by Chris Tankersley