include and require with dirname when using relative paths

[christoph]

If you imagine a file requiring files that themselves require other files, you get a tree of requires. The path is always relative to the root of that tree!

This is the reason why we need absolute paths, enable by

require_once(dirname(FILE) . "/relative_path_to_file");

for example

require_once(dirname(FILE)."/../http/php/database-pgsql.php");

In a standard Mapbender installation, not using "dirname" will do no harm, but in complex projects with weird folder structure, it will.