Very lightweight and simple plugin that displays the currently installed PHP version in the "At a Glance" admin dashboard widget.
Instructions for installing the Current PHP Version Plugin.
- In your WordPress admin go to Plugins -> Add New.
- Enter "Current PHP Version" in the text box and click Search Plugins.
- In the list of Plugins click Install Now next to the Current PHP Version Plugin.
- Once installed click to activate.
- Go to your WordPress dashboard page and look next to your WordPress version to see what PHP version is running.