Arul Prasad J

This is a lightweight WordPress plugin that displays the current running PHP/MySQL version inside “At a Glance” admin dashboard widget.
Plugin uses standard actions and filters only. (No jQuery used)
If you love this plugin, <a href="https://paypal.me/arulprasadj?locale.x=en_GB" rel="nofollow ugc">buy me a cup of coffee</a>

WP PHP Version Display

Displays the current running PHP/MySQL version inside "At a Glance" admin dashboard widget.

ray.viljoen

Fubra

Adds custom menu under WordPress Admin to view all PHP info as produced with the standard phpinfo function, but without breaking the page strucure.
Developed by <a href="http://www.catn.com" rel="nofollow ugc">PHP Hosting Experts CatN</a>

PHP Server Info

A very simple plugin for displaying full PHP Info from within the WordPress Admin menu.

WP PHP Version Display vs PHP Server Info