How do I show metrics with PHP or Javascript

Do you want to display this metrics from the database? or Is it static information that you want to show it on the page?

PHP is a server side scripting language where the code runs on the webserver and sends the output to the browser(as HTML)
http://php.net/manual/en/intro-whatis.php

Javascript is Client side scripting language where the code runs on browser and used for performing actions on the browser.

I think the PHP approach is the right one.  As PHP prepares the HTML document, it can access the information in the database and use this information to inject the metrics into appropriate HTML tags.  PHP can also control the CSS styling of these tags, so you can set the location, size, color and other information related to the display of your metrics.