To set/change the PHP versoin of the website, follow the steps given below :
1. Login to the
Plesk Panel.
2. Click on the domain name for which you want to set/change the PHP Version.
3. Then click on the
Websites & Domains tab.
4. Next, click on
PHP Settings.
5. Click on drop-down and select appropriate PHP version.
6. Click on
Apply and
Ok at the bottom of the page.