PHP7 Changes

[Kayoti]

*major refactor of DB functions ->mysqli *major refactor of project functions to adapt & work with mysqli functions major upgrade to php code removed deprecated functions introduced compatible functions with PHP7 refactored code that was ambiguous simplified some code *fixed all warning and notices that caused some issues and bugs on the project changes may not be optimal but are enough to get the project working with php7 audit log page does not display data for me on my tests (this could be an issue from before) could be fixed not a major issue