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Managing content
(Managing filters at course or activity level, Managing filters at site level moved to Managing filters)
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{{Filters}}
{{Managing content}}
Filters can transform simple text into different often more complex forms.  The potential for a filter is set at the site level and then it can be applied or removed as needed in site on a context level.  HTML hyperlinking, or a text link that automatically calls up a sound player are examples of text filters.
Filters can be used to add links, insert multimedia players, convert Mathematical expressions or emoticons into images and more.


There are many applications for filters. You could turn on the LaTeX filter just for courses in the Maths and Physics categories so users could create math formula notations with text based short cuts. Here the LaTeX filter would need to be enabled for the site and you would need permission in the context of those course categories to edit the filter settings. A teacher could turn off glossary linking in a course exam, or in the entire course.
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.
 
Filters are one of the general categories that can be selected for a course backup or as part of the course import process.  


==Standard filters==
==Standard filters==
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*[[Display emoticons as images filter|Display emoticons as images]] - This converts emoticon (smiley) characters into images
*[[Display emoticons as images filter|Display emoticons as images]] - This converts emoticon (smiley) characters into images
*[[Email protection filter|Email protection]] - This obfuscates email address links to make them more difficult for spammers to harvest  
*[[Email protection filter|Email protection]] - This obfuscates email address links to make them more difficult for spammers to harvest  
*[[Glossary auto-linking filter|Glossary auto-linking]]
*[[Glossary auto-linking filter|Glossary auto-linking]] - This scans text for glossary entries that exist in the same course and creates a link
*[[Multimedia plugins filter|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
*[[Multimedia plugins filter|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 filter|Multi-language content]] - This filter enables resources to be created in multiple languages
*[[Multi-language content filter|Multi-language content]] - This filter enables resources to be created in multiple languages
*[[TeX notation filter|TeX notation]]
*[[TeX notation filter|TeX notation]]
*[[Word censorship]] - This filter "blacks out" words found on a list.
*[[Word censorship]] - This filter "blacks out" words found on a list
 
==Site administration settings==
 
===Common filter settings===


A site administrator can change the following settings in ''Settings > Site administration > Filters > Common filter settings'':
==Contributed filters==


* Text cache lifetime - Text filters can take a lot of processor power to analyse. If you have a large number of courses, the filters may slow your system. The text cache lifetime determines how often the filters run. If you set them to run too frequently, your system may slow down. If you set them to run too infrequently, analysing new content will take too long and users will notice. You should experiment to find the correct amount of time for your server.
Filters have also been made by developers in the community. Some docs online for these include:
* Filter uploaded files - This setting enables uploaded files (HTML and text only) to be processed by the filters system. You can choose to have none, only HTML or all files filtered.
*[[FontAwesome_filter|FontAwesome]] - This scans text for icons that can be embedded using the FontAwesome icon set.
* Filter match once per page - This setting effects the glossary, activity and resource linking filters. If set to yes, only the first match on the complete page will be converted to a link. All others will be ignored.
* Filter match once per text - This setting effects the glossary, activity and resource linking filters. If set to yes, only the first match in a discrete block of text will be converted to a link. All others in that text block will be ignored.
* Filter all strings - The filter all strings common filter setting in Moodle 1.9 (which only worked for the multi-language filter) has been replaced by the 'Apply to' setting in Manage filters.
 
===File activity module setting===
 
A site administrator can change the following setting in ''Settings > Site administration > Plugins > Activity modules > File'':
 
* Use filters on file content - This applies to content in HTML pages
[[File:Use_filters_on_File_content.png]]


==See also==
==See also==


*[[Managing filters]]
*[[Filter settings|Common filter settings]] for the site
*[[Filters FAQ]]
*[[Filters FAQ]]
*[[Filters used on the Moodle.org forums]]
 
*Using Moodle [http://moodle.org/mod/forum/view.php?id=1510 Text filters forum]
[[Category:Filter]]


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Latest revision as of 06:01, 16 October 2013

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:

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.

See also

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