Our service provider is about to upgrade us to the above versions of Apache and PHP. Can you confirm that Texis is compatible with these versions before we proceed with the upgrade? Thanks in advance.
PHP is irrelevant to Texis unless PHP breaks Apache CGI which is doubtful.
Texis is known to work with various versions of Apache 2 including 2.2 so I don't see any reason is shouldn't work with 2.2.17. Again, as long as they don't break CGI there shouldn't be a problem.