php xmllib is a class that is capable of parsing XML documents using only PHP code, without the need for a special extension library like Expat or any other XML parsing library. The code is very compact and efficient compared to competing libraries. However, it's not as feature-rich.
pimentcore is a Web interface to any PostgreSQL database that was designed with pimentech-dbutils. It allows you to set access rights for tables, to hide or rename things, and perform other operations. Unlike phpmyadmin or the likes, the interface allows complex searches, editing, and additions to the data.