Difference between revisions of "Filters"

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Note: You are currently viewing documentation for Moodle 2.0. Up-to-date documentation for the latest stable version is available here: Filters.

(Managing filters at course or activity level, Managing filters at site level moved to Managing filters)
(Site administration settings: moved to Filter settings)
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*[[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'':
 
 
* 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.
 
* 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.
 
* 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- The filter all strings common filter setting in Moodle 1.9 (which only worked for the multi-language filter) has been replaced by the 'Apply to' setting in Manage filters.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==

Revision as of 11:46, 4 October 2011

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.

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.

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

Filters in Moodle include:

See also