installed 1.8.4 build 10800
My server uses php 5.3.3 or 5.6 or 7.
installation would not proceed with 5.6 or 7. Said php ext not available. changed to 5.3.3. Installed. cron would not run. guessed and changed php to 5.6 and cron runs.
also it would be nice to list all dir that need to be chmod to proceed installation insted of refreshimg 15 times to find again, chmod these directories, etc.