A phpinfo page can show your server's current PHP information such as version, variable settings and enabled/disabled extensions.
Step 1 - Create a file named phpinfo.php and put it in your website's public_html folder. If you're unsure how, click here for a guide on doing this with the cPanel file manager.
Step 2 - Put this code in the file:
If you're unsure how to do this, click here for a guide on editing files with the cPanel File Manager
Step 3 - To view your site's PHP information, simply go to the website. For example, if your website is yourdomain.net.au you would visit yourdomain.net.au/phpinfo.php