Enabling application-level PHP version upgrade or downgrade could significantly enhance flexibility for developers and administrators. Currently, PHP version management is restricted to server-level changes, which means any adjustments apply universally across all hosted applications. By allowing individual applications to select their own PHP versions, organizations can ensure compatibility with specific applications while testing newer versions on others. This capability would support better version control and mitigate potential disruptions caused by broad server-level upgrades or downgrades. This feature is particularly useful in environments where different applications have varying requirements for PHP versions due to dependencies or ongoing development.