Filters allows the automatic transformation of entered text into diffferent, often more complex forms. It can be used to add links, insert multimedia players, convert mathematical expressions, autolink glossary entries or emoticons into images and much more.
A filter may be enabled at the site level and then removed as needed at the course or activity level.
Example- A teacher can disable glossary auto-linking in a quiz.
Filters in Moodle:
Activity name auto-linking- This scans text for activity titles that exist in the same course and creates a link.
Algebra notation- This filter will convert algebra code into GIF images.
Convert URLs into links- This filter converts URLs in selected formats, such as Moodle auto-format, to click-able links.
Database auto-linking- This filter enables automatic linking of Database module entries.
Display emoticon as images- This converts emoticon (smiley) characters into images.
Email protection- This obfuscates email address links to make them more difficult for spammers to harvest.
Glossary auto-linking- This scans text for glossary entries that exist in the same course and creates a link.
Multimedia plugins- This finds a link in text that points to a multimedia resource and replaces the link with an appropriate multimedia player code which can play the resource.
Multi-language content- This filter enables resources to be created in multiple languages.
Tex notation- It allows to convert tex expressions into GIF images.
Word censorship- This filter "blacks out" words found on a list.