In my attempt to fix internal server errors, I went about looking for simple ways to find the php version which powers the wordpress installation on our web hosting server. Here is the small tip to do it easily.
1. Create New PHP file
Create a new document in Notepad or any other text editor
2. PHP Info data
Type following with no spaces or lines above or below
3. Save PHP File
Save the file as checkversion.php or any other name you like, but should end with .php
4. Upload to Server
Upload using an FTP client to the root of your domain name where wordpress is hosted.
5 Run File in Browser
Run http://yourdomain.com/checkversion.php in your browser
And a detailed page will reveal all the information about your PHP version and lots of technical details about your PHP core and server configuration which you never knew.