To find the PHP version of your web site you don’t need to contact the support team of your server, even if you don’t have access to the control panel where hosting settings reveal such details.

Just open your Notepad or any simple text (no formatting) editor, and paste the following code:

<?php
phpinfo();
?>

Save the file as info.php and upload it to the root of your web site. Then open it with your web browser by going to YourSite/info.php

Enjoy!