title: Get the web server version in PHP
body: <p>I would like the version of a web server (Nginx, MySQL, MariaDB, ...) in PHP.</p>
  
  <p>I know the function for Apache: <code>apache_get_version()</code>.
  There are many <code>phpinfo()</code> which returns all values but how to exploit?</p>
  
  <p>You would have an idea or it is not possible for the moment?</p>