Enable PHP safe mode
1. Login to Plesk panel.
2. Click 'Domains' on the left side of the pane.
3. Click "Control panel" in front of the domain for which the change has to be made.
4. Select "Websites and Domains" tab.
5. Select the "domain name" for which PHP safemode should be enabled.
6. Enable Check box in front of "PHP safemode" to enable PHP safemode.
7. Click 'OK' button.