This script is used to generate a reverted glossary extracted from Moodle.
Let's say, you are having a german word with a french equivalent word, this script will permute the french and german world. An importable XML File will be generated, to be imported in MOODLE.
php revert-glossary.php glossary-from-moodle-to-reverse.xml
This will generate glossary-from-moodle-to-reverse-reversed-to-import.xml file to import in moodle