Filters

Filters can be used to add links, insert multimedia players, convert Mathematical expressions or emoticons into images and more.

A filter may be enabled at the site level and then removed as needed at the course or activity level. Thus a teacher can disable glossary auto-linking in a quiz for example.

Standard filters

Filters in Moodle include:

• Activity names 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 - As the name suggests, this filter enables automatic linking of Database module entries
• Display emoticons 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
• MathJax - For adding Mathematical equations and expressions using an equation editor (new in 2.7)
• 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
• Word censorship - This filter "blacks out" words found on a list

Contributed filters

Filters have also been made by developers in the community. Some docs online for these include:

• FontAwesome - This scans text for icons that can be embedded using the FontAwesome icon set.
• IPA - Renders simple X-SAMPA markup in the International Phonetic Alphabet

See also

• Managing filters
• Common filter settings for the site
• Filters FAQ