PHP Settings in Plesk
On this tab you can set any PHP configuration options that may be needed either for web applications to work properly or for security reasons. Because we have already set the "Common PHP settings management" option on the Permissions tab, anything we set here would be considered a default. Even if we had not set that option, though, it's rarely useful to statically define PHP configuration parameters in this way unless we know only one type of web application will be used in any subscriptions created under this Hosting Plan. We don't really have anything that should be set here for any particular reason, so move on to the next tab.