Non-static method systemChecker::getAdminDirectoryList() should not be called statically
Use of undefined constant: fileName
Uncaught file-not-found exception
NOTE: A future re-factoring might include renaming this class method so that code reviewers don't flag it as a clash with PHP reserved function names
Undefined variable $error_number
Undefined variable $remove_from_queryCache
Undefined variable: $db_prefix
Abbreviated ternary operator triggers same error.
Can't use abbreviated ternary operator here, else a boolean is returned.
Undefined index: list_order
Merge pull request #186 from drbyte/fixing-warnings

Fixing warnings