1. Getting Started
      1. Video Quick-Start Series
      2. Server Requirements
        1. MySQL 5.0.51 Issues
      3. Installation
        1. Basic Installation
          1. MODx Revolution on Debian
          2. Problems with WAMPServer 2.0i
          3. Lighttpd Guide
          4. Installation on a server running ModSecurity
          5. MODX and Suhosin
          6. Nginx Server Config
        2. Successful Installation, Now What Do I Do?
        3. Successful Installation, Now What Do I Do?
        4. Advanced Installation
        5. Git Installation
        6. Command Line Installation
          1. The Setup Config Xml File
        7. Troubleshooting Installation
        8. Using MODx Revolution from SVN
      4. An Overview of MODX
        1. Glossary of Revolution Terms
          1. Explanation of Directory Structure
        2. Roadmap
        3. MODX Revolution Framework Structure Ideology
        4. What's New in 2.3
    2. FAQs & Troubleshooting
      1. CMP Development FAQs & Troubleshooting
    3. Making Sites with MODx
      1. Structuring Your Site
        1. Resources
          1. Content Types
          2. Named Anchor
          3. Static Resource
          4. Symlink
            1. Using Resource Symlinks
          5. Weblink
        2. Templates
        3. Chunks
        4. Using Snippets
      2. Tag Syntax
      3. Customizing Content
        1. Template Variables
          1. Creating a Template Variable
          2. Adding a Custom TV Type - MODX 2.2
          3. Bindings
            1. CHUNK Binding
            2. DIRECTORY Binding
            3. EVAL Binding
            4. FILE Binding
            5. INHERIT Binding
            6. RESOURCE Binding
            7. SELECT Binding
          4. Template Variable Input Types
          5. Template Variable Output Types
            1. Date TV Output Type
            2. Delimiter TV Output Type
            3. HTML Tag TV Output Type
            4. Image TV Output Type
            5. URL TV Output Type
          6. Adding a Custom TV Input Type
          7. Adding a Custom TV Output Type
          8. Creating a multi-select box for related pages in your template
          9. Accessing Template Variable Values via the API
        2. Properties and Property Sets
        3. Input and Output Filters (Output Modifiers)
          1. Custom Output Filter Examples
      4. Commonly Used Template Tags
        1. Date Formats
    4. Administering Your Site
      1. Settings
        1. System Settings
          1. access_category_enabled
          2. date_timezone
          3. access_context_enabled
          4. access_resource_group_enabled
          5. allow_duplicate_alias
          6. allow_forward_across_contexts
          7. allow_multiple_emails
          8. allow_tags_in_post
          9. archive_with
          10. automatic_alias
          11. auto_check_pkg_updates
          12. auto_check_pkg_updates_cache_expire
          13. auto_menuindex
          14. base_help_url
          15. blocked_minutes
          16. cache_action_map
          17. cache_context_settings
          18. cache_db
          19. cache_db_expires
          20. cache_db_session
          21. cache_default
          22. cache_disabled
          23. cache_format
          24. cache_handler
          25. cache_json
          26. cache_json_expires
          27. cache_lang_js
          28. cache_lexicon_topics
          29. cache_noncore_lexicon_topics
          30. cache_resource
          31. cache_resource_expires
          32. cache_scripts
          33. cache_system_settings
          34. clear_cache_refresh_trees
          35. compress_css
          36. compress_js
          37. concat_js
          38. container_suffix
          39. cultureKey
          40. custom_resource_classes
          41. default_per_page
          42. default_template
          43. editor_css_path
          44. editor_css_selectors
          45. emailsender
          46. emailsubject
          47. enable_dragdrop
          48. error_page
          49. extension_packages
          50. failed_login_attempts
          51. feed_modx_news
          52. feed_modx_news_enabled
          53. feed_modx_security
          54. feed_modx_security_enabled
          55. fe_editor_lang
          56. filemanager_path
          57. filemanager_path_relative
          58. filemanager_url
          59. filemanager_url_relative
          60. forgot_login_email
          61. friendly_alias_lowercase_only
          62. forward_merge_excludes
          63. friendly_alias_max_length
          64. friendly_alias_restrict_chars
          65. friendly_alias_restrict_chars_pattern
          66. friendly_alias_strip_element_tags
          67. friendly_alias_translit
          68. friendly_alias_translit_class
          69. friendly_alias_translit_class_path
          70. friendly_alias_trim_chars
          71. friendly_alias_urls
          72. friendly_alias_word_delimiter
          73. friendly_alias_word_delimiters
          74. friendly_urls
          75. friendly_url_prefix
          76. friendly_url_suffix
          77. global_duplicate_uri_check
          78. hidemenu_default
          79. link_tag_scheme
          80. mail_charset
          81. mail_encoding
          82. mail_smtp_auth
          83. mail_smtp_helo
          84. mail_smtp_hosts
          85. mail_smtp_keepalive
          86. mail_smtp_pass
          87. mail_smtp_port
          88. mail_smtp_prefix
          89. mail_smtp_single_to
          90. mail_smtp_timeout
          91. mail_smtp_user
          92. mail_use_smtp
          93. manager_date_format
          94. manager_direction
          95. manager_favicon_url
          96. manager_language
          97. manager_lang_attribute
          98. manager_theme
          99. manager_time_format
          100. context_tree_sort
          101. context_tree_sortby
          102. context_tree_sortdir
          103. session_enabled
          104. modx_charset
          105. new_file_permissions
          106. new_folder_permissions
          107. password_generated_length
          108. password_min_length
          109. phpthumb_allow_src_above_docroot
          110. phpthumb_cache_maxage
          111. phpthumb_cache_maxfiles
          112. phpthumb_cache_maxsize
          113. phpthumb_cache_source_enabled
          114. phpthumb_document_root
          115. phpthumb_error_bgcolor
          116. phpthumb_error_fontsize
          117. phpthumb_error_textcolor
          118. phpthumb_far
          119. phpthumb_imagemagick_path
          120. phpthumb_nohotlink_enabled
          121. phpthumb_nohotlink_erase_image
          122. phpthumb_nohotlink_text_message
          123. phpthumb_nohotlink_valid_domains
          124. phpthumb_nooffsitelink_enabled
          125. phpthumb_nooffsitelink_erase_image
          126. phpthumb_nooffsitelink_require_refer
          127. phpthumb_nooffsitelink_text_message
          128. phpthumb_nooffsitelink_valid_domains
          129. phpthumb_nooffsitelink_watermark_src
          130. phpthumb_zoomcrop
          131. principal_targets
          132. proxy_auth_type
          133. proxy_host
          134. proxy_password
          135. proxy_port
          136. proxy_username
          137. publish_default
          138. rb_base_dir
          139. rb_base_url
          140. request_controller
          141. request_param_alias
          142. request_param_id
          143. resource_tree_node_name
          144. resource_tree_node_tooltip
          145. richtext_default
          146. search_default
          147. server_offset_time
          148. server_protocol
          149. session_cookie_domain
          150. session_cookie_lifetime
          151. session_cookie_path
          152. session_cookie_secure
          153. session_handler_class
          154. session_name
          155. settings_version
          156. signupemail_message
          157. site_name
          158. site_start
          159. site_status
          160. site_unavailable_message
          161. site_unavailable_page
          162. strip_image_paths
          163. symlink_merge_fields
          164. tree_default_sort
          165. tree_root_id
          166. tvs_below_content
          167. udperms_allowroot
          168. ui_debug_mode
          169. unauthorized_page
          170. upload_maxsize
          171. use_alias_path
          172. use_browser
          173. use_editor
          174. use_multibyte
          175. welcome_screen
          176. which_editor
          177. which_element_editor
          178. xhtml_urls
      2. Using Friendly URLs
      3. Contexts
        1. Creating a Subdomain from a Folder using Virtual Hosts
        2. Using One Gateway Plugin to Manage Multiple Domains
      4. Customizing the Manager
        1. Customizing the Manager via Plugins
        2. Form Customization Profiles
        3. Form Customization Sets
          1. Customizing Tabs via Form Customization
          2. MODX GitHub Contributor's Guide
        4. Manager Templates and Themes
      5. MODX GitHub Integrator's Guide
      6. Security
        1. Hardening MODX Revolution
        2. Policies
          1. ACLs
          2. Permissions
            1. Permissions - Administrator Policy
            2. Permissions - Resource Policy
          3. PolicyTemplates
        3. Resource Groups
        4. Roles
        5. Security Standards
        6. Security Tutorials
          1. More on the Anonymous User Group
          2. Creating a Second Super Admin User
          3. Giving a User Manager Access
          4. Making Member-Only Pages
          5. Restricting an Element from Users
        7. Troubleshooting Security
          1. Resetting a User Password Manually
        8. User Groups
        9. Users
      7. Installing a Package
        1. Troubleshooting Package Management
      8. Upgrading MODX
        1. Upgrading to Revolution 2.0.5
        2. Upgrading from 2.0.x to 2.1.x
        3. Upgrading from Versions Earlier than 2.0.5
        4. Upgrading to 2.2.x
        5. Upgrading to Revolution 2.0.0-rc-2
        6. Troubleshooting Upgrades
        7. Upgrading from MODx Evolution
          1. Functional Changes from Evolution
      9. Moving Your Site to a New Server, or to Root from Subfolder
      10. Media Sources
        1. Adding a Media Source
        2. Assigning Media Sources to TVs
        3. Media Source Types
          1. Media Source Type - File System
          2. Media Source Type - S3
        4. Securing a Media Source
          1. Creating a Media Source for Clients Tutorial
      11. Dashboards
        1. Assigning a Dashboard to a User Group
        2. Creating a Dashboard Widget
        3. Dashboard Widget Types
          1. Dashboard Widget Type - File
          2. Dashboard Widget Type - HTML
          3. Dashboard Widget Type - Inline PHP
          4. Dashboard Widget Type - Snippet
        4. Managing Your Dashboard
    5. Developing in MODx
      1. Code Standards
      2. Overview of MODx Development
        1. Developer Introduction
          1. Getting Started Developing
        2. Extras Directories
        3. Setting up a Development Environment
      3. Basic Development
        1. Plugins
          1. System Events
            1. OnBeforeCacheUpdate
            2. OnBeforeChunkFormDelete
            3. OnBeforeChunkFormSave
            4. OnBeforeDocFormDelete
            5. OnBeforeDocFormSave
            6. OnBeforeEmptyTrash
            7. OnBeforeManagerLogin
            8. OnBeforeManagerLogout
            9. OnBeforeManagerPageInit
            10. OnBeforePluginFormDelete
            11. OnBeforePluginFormSave
            12. OnBeforeSaveWebPageCache
            13. OnBeforeSnipFormDelete
            14. OnBeforeSnipFormSave
            15. OnBeforeTempFormDelete
            16. OnBeforeTempFormSave
            17. OnBeforeTVFormDelete
            18. OnBeforeTVFormSave
            19. OnBeforeUserActivate
            20. OnBeforeUserFormDelete
            21. OnBeforeUserFormSave
            22. OnBeforeWebLogin
            23. OnBeforeWebLogout
            24. OnCacheUpdate
            25. OnCategoryBeforeRemove
            26. OnCategoryBeforeSave
            27. OnCategoryRemove
            28. OnCategorySave
            29. OnChunkBeforeRemove
            30. OnChunkBeforeSave
            31. OnChunkFormDelete
            32. OnChunkFormPrerender
            33. OnChunkFormRender
            34. OnChunkFormSave
            35. OnChunkRemove
            36. OnChunkSave
            37. OnContextBeforeRemove
            38. OnContextBeforeSave
            39. OnContextFormPrerender
            40. OnContextFormRender
            41. OnContextRemove
            42. OnContextSave
            43. OnDocFormDelete
            44. OnDocFormPrerender
            45. OnDocFormRender
            46. OnDocFormSave
            47. OnDocPublished
            48. OnDocUnPublished
            49. OnEmptyTrash
            50. OnFileManagerUpload
            51. OnHandleRequest
            52. OnInitCulture
            53. OnLoadWebDocument
            54. OnLoadWebPageCache
            55. OnManagerAuthentication
            56. OnManagerLogin
            57. OnManagerLoginFormPrerender
            58. OnManagerLoginFormRender
            59. OnManagerLogout
            60. OnManagerPageAfterRender
            61. OnManagerPageBeforeRender
            62. OnManagerPageInit
            63. OnPageNotFound
            64. OnPageUnauthorized
            65. OnParseDocument
            66. OnPluginBeforeRemove
            67. OnPluginBeforeSave
            68. OnPluginEventRemove
            69. OnPluginFormDelete
            70. OnPluginFormPrerender
            71. OnPluginFormRender
            72. OnPluginFormSave
            73. OnPluginRemove
            74. OnPluginSave
            75. OnPropertySetBeforeRemove
            76. OnPropertySetBeforeSave
            77. OnPropertySetRemove
            78. OnPropertySetSave
            79. OnResourceGroupBeforeRemove
            80. OnResourceGroupBeforeSave
            81. OnResourceGroupRemove
            82. OnResourceGroupSave
            83. OnRichTextBrowserInit
            84. OnRichTextEditorInit
            85. OnRichTextEditorRegister
            86. OnSiteRefresh
            87. OnSiteSettingsRender
            88. OnTemplateVarBeforeRemove
            89. OnTemplateVarBeforeSave
            90. OnTemplateVarRemove
            91. OnTemplateVarSave
            92. OnUserActivate
            93. OnUserBeforeRemove
            94. OnUserBeforeSave
            95. OnUserChangePassword
            96. OnUserFormDelete
            97. OnUserFormSave
            98. OnUserNotFound
            99. OnUserRemove
            100. OnUserSave
            101. OnWebAuthentication
            102. OnWebLogin
            103. OnWebLogout
            104. OnWebPageComplete
            105. OnWebPageInit
            106. OnWebPagePrerender
        2. Snippets
          1. Adding CSS and JS to Your Pages Through Snippets
          2. How to Write a Good Chunk
          3. How to Write a Good Snippet
          4. Templating Your Snippets
        3. xPDO
      4. Advanced Development
        1. Caching
          1. Setting up Memcache in MODX
        2. Custom Manager Pages
          1. Custom Manager Pages in 2.3
          2. Actions and Menus
            1. Action List
          3. Custom Manager Pages Tutorial
          4. MODExt
            1. MODx.combo.ComboBox
            2. MODx.Console
            3. MODx.FormPanel
            4. MODx.grid.Grid
            5. MODx.grid.LocalGrid
            6. MODx.msg
            7. MODx.tree.Tree
            8. MODx.Window
            9. MODExt Tutorials
              1. 1. Ext JS Tutorial - Message Boxes
              2. 2. Ext JS Tutorial - Ajax Include
              3. 3. Ext JS Tutorial - Animation
              4. 4. Ext JS Tutorial - Manipulating Nodes
              5. 5. Ext JS Tutorial - Panels
              6. 7. Ext JS Tutoral - Advanced Grid
              7. 8. Ext JS Tutorial - Inside a CMP
            10. MODExt MODx Object
        3. Custom Resource Classes
          1. Creating a Resource Class
            1. Creating a Resource Class - Step 2
            2. Creating a Resource Class - Step 3
            3. Creating a Resource Class - Step 4
        4. Extending modUser
        5. From the Command Line (CLI)
        6. Internationalization
          1. Adding a Translation
        7. MODx Services
          1. modFileHandler
          2. modMail
          3. modRegistry
        8. Namespaces
        9. Package Management
          1. Creating a 3rd Party Component Build Script
          2. Providers
          3. Transport Packages
        10. Using runProcessor
        11. Validating Requests: Tokens and Nonces
        12. Developing RESTful APIs
      5. Other Development Resources
        1. Summary of Legacy Code Removed in 2.1
        2. API Reference
        3. Class Reference
          1. modResource
            1. modResource.isMember
          2. modChunk
            1. modChunk.getContent
            2. modChunk.setContent
          3. modUser
            1. modUser.addSessionContext
            2. modUser.changePassword
            3. modUser.endSession
            4. modUser.getSessionContexts
            5. modUser.getSettings
            6. modUser.hasSessionContext
            7. modUser.isAuthenticated
            8. modUser.isMember
            9. modUser.loadAttributes
            10. modUser.removeSessionContext
            11. modUser.removeSessionContextVars
            12. modUser.removeSessionCookie
          4. modX
            1. modX.addEventListener
            2. modX.checkForLocks
            3. modX.checkSession
            4. modX.executeProcessor
            5. modX.getAuthenticatedUser
            6. modX.getCacheManager
            7. modX.getChildIds
            8. modX.getChunk
            9. modX.getConfig
            10. modX.getContext
            11. modX.getEventMap
            12. modX.getLoginUserID
            13. modX.getLoginUserName
            14. modX.getParentIds
            15. modX.getParser
            16. modX.getPlaceholder
            17. modX.getRegisteredClientScripts
            18. modX.getRegisteredClientStartupScripts
            19. modX.getRequest
            20. modX.getResponse
            21. modX.getService
            22. modX.getSessionState
            23. modX.getTree
            24. modX.getUser
            25. modX.getVersionData
            26. modX.handleRequest
            27. modX.hasPermission
            28. modX.initialize
            29. modX.invokeEvent
            30. modX.lexicon
            31. modX.makeUrl
            32. modX.parseChunk
            33. modX.regClientCSS
            34. modX.regClientHTMLBlock
            35. modX.regClientScript
            36. modX.regClientStartupHTMLBlock
            37. modX.regClientStartupScript
            38. modX.reloadConfig
            39. modX.removeAllEventListener
            40. modX.removeEventListener
            41. modX.runProcessor
            42. modX.runSnippet
            43. modX.sendError
            44. modX.sendErrorPage
            45. modX.sendForward
            46. modX.sendRedirect
            47. modX.sendUnauthorizedPage
            48. modX.setDebug
            49. modX.setPlaceholder
            50. modX.setPlaceholders
            51. modX.switchContext
            52. modX.toPlaceholder
            53. modX.toPlaceholders
            54. modX.unsetPlaceholder
            55. modX.unsetPlaceholders
        4. Loading MODx Externally
        5. Reserved Parameters
    6. Case Studies and Tutorials
      1. Developing an Extra in MODX Revolution
        1. Developing an Extra in MODX Revolution, Part II
        2. Developing an Extra in MODX Revolution, Part III
      2. Developing an Extra in MODX Revolution - MODX 2.1 and Earlier
        1. Developing an Extra in MODX Revolution, Part II - MODX 2.1 and Earlier
        2. Developing an Extra in MODX Revolution, Part III - MODX 2.1 and Earlier
      3. PHP Coding in MODx Revolution, Pt. I
        1. PHP Coding in MODx Revolution, Pt. II
        2. PHP Coding in MODx Revolution, Pt. III
      4. Using Custom Database Tables in your 3rd Party Components
      5. Creating a Blog in MODx Revolution
      6. Loading Pages in the Front-End via AJAX and jQuery Tabs
      7. Reverse Engineer xPDO Classes from Existing Database Table
      8. Integrating a Template into MODX Tutorial
      9. Quick and Easy MODX Tutorials
        1. Automated Server-Side Image Editing
      10. Adding Custom Fields to Manager Forms
      11. Create a Multilingual Website with migxMultiLang
      12. Managing Resources and Elements via SVN
    7. MODX Community Information
      1. Becoming a Core Contributor
      2. Filing Bug Reports
      3. Getting a MODx Account
      4. Using GitHub

Input and Output Filters (Output Modifiers)

Last edited by Luk on Jun 6, 2014.

Welcome to the MODX Documentation. It is an ongoing effort of the MODX community. If you would like to participate or if you notice any errors or missing content, please let us know.

What are Filters?

Filters in Revolution allow you to manipulate the way data is presented or parsed in a tag. They allow you to modify values from inside your templates.

Input Filter

Currently the input filter processes tag calls in preparation for the output filter. It is generally used only internally by MODx.

Output Filter

In Revolution, the Output Filter applies one or more of series of output modifiers, which behave similarly to PHx calls in MODx Evolution - except they're built into the core. The syntax looks like this:

[[element:modifier=`value`]]

They can also be chained (executed left to right):

[[element:modifier:anothermodifier=`value`:andanothermodifier:yetanother=`value2`]]

You can also use these to modify Snippet output; note that the modifier comes after the Snippet name and before the question mark, e.g.

[[mySnippet:modifier=`value`? &mySnippetParam=`something`]]

If you have longer code in a :then=``:else=`` statement and you want to make it more readable by putting it on multiple lines, it has to be done like this:

[[+placeholder:is=`0`:then=`
     // code
`:else=`
     // code
`]]

Output Modifiers

The following table lists some of the existing modifiers and shows examples of their use. Although the examples below are placeholder tags, the output modifiers can be used with any MODx tag. Make sure that the placeholder used are actually receiving data.

Conditional output modifiers

Modifier Description Example
if, input
or
Can be used to string output modifiers together with an "OR" relationship.
[[+numbooks:is=`5`:or:is=`6`:then=`There are 5 or 6 books!`:else=`Not sure how many books`]]
and
Can be used to string output modifiers together with an "AND" relationship.
isequalto, isequal, equalto, equals, is, eq
Compares to a passed value, and moves on if it's the same. Used with "then" and "else"
[[+numbooks:isequalto=`5`:then=`There are 5 books!`:else=`Not sure how many books`]]
notequalto, notequals, isnt, isnot, neq, ne
Compares to a passed value, and moves on if it is not the same. Used with "then" and "else"
[[+numbooks:notequalto=`5`:then=`Not sure how many books`:else=`There are 5 books!`]]
greaterthanorequalto, equalorgreaterthen, ge, eg, isgte, gte
Compares to a passed value, and moves on if it is greater than or equal to the value. Used with "then" and "else".
[[+numbooks:gte=`5`:then=`There are 5 books or more than 5 books`:else=`There are less than 5 books`]]
isgreaterthan, greaterthan, isgt, gt
Compares to a passed value, and moves on if it is greater than the value. Used with "then" and "else".
[[+numbooks:gt=`5`:then=`There are more than 5 books`:else=`There are less than 5 books`]]
equaltoorlessthan, lessthanorequalto, el, le, islte, lte
Compares to a passed value, and moves on if it is less then or equal to the value. Used with "then" and "else".
[[+numbooks:lte=`5`:then=`There are 5 or less than 5 books`:else=`There are more than 5 books`]]
islowerthan, islessthan, lowerthan, lessthan, islt, lt
Compares to a passed value, and moves on if it is less than the value. Used with "then" and "else". [[+numbooks:lt=`5`:then=`There are less than 5 books`:else=`There are more than 5 books`]]
hide
Will check earlier conditions, and hide the element if the conditions were met.
[[+numbooks:lt=`1`:hide]]
show
Will check earlier conditions, and show the element if the conditions were met.
[[+numbooks:gt=`0`:show]]
then
Conditional usage.
[[+numbooks:gt=`0`:then=`Now available!`]]
else
Conditional usage, together with then.
[[+numbooks:gt=`0`:then=`Now available!`:else=`Sorry, currently sold out.`]]
select
memberof, ismember, mo
Checks if the user is a member of the specified group(s).
[[+modx.user.id:memberof=`Administrator`]]

String output modifiers

Modifier Description Example
cat Appends the option's value (if not empty) to the input value [[+numbooks:cat=` books`]]
lcase, lowercase, strtolower Transforms strings to lowercase. Similar to PHP's strtolower [[+title:lcase]]
ucase, uppercase, strtoupper Transforms strings to uppercase. Similar to PHP's strtoupper [[+headline:ucase]]
ucwords Transforms the first letter of a word to uppercase. Similar to PHP's ucwords [[+title:ucwords]]
ucfirst Transforms the first letter of the string to uppercase. Similar to PHP's ucfirst [[+name:ucfirst]]
htmlent, htmlentities Replaces any character that has an HTML entity with that entity. Similar to PHP's htmlentities. Uses the current value the system setting "modx_charset" with flag ENT_QUOTES
[[+email:htmlent]]
esc,escape Safely escapes character values using regex and str_replace. Also escapes [, ] and ` [[+email:escape]]
strip Replaces all linebreaks, tabs and multiple spaces with just one space [[+textdocument:strip]]
stripString Strips string of specified value [[+name:stripString=`Mr.`]]
replace Replaces one value with another [[+pagetitle:replace=`Mr.==Mrs.`]]
striptags, stripTags,notags,strip_tags Removes HTML tags from the input. Optionally accepts a value to indicate which tags to allow. Similar to PHP's strip_tags [[+code:strip_tags=`

`]]

len,length, strlen
Counts the length of the passed string. Similar to PHP's strlen [[+longstring:strlen]]
reverse, strrev Reverses the input, character by character. Similar to PHP's strrev [[+mirrortext:reverse]]
wordwrap Inserts a newline character after the set amount of characters. Similar to PHP's wordwrap. Takes optional value to set wordwrap position. [[+bodytext:wordwrap=`80`]]
wordwrapcut Inserts a newline character after the set amount of characters, irrespective of word boundaries. Similar to PHP's wordwrap, with word cutting enabled. Takes optional value to set wordwrap position. [[+bodytext:wordwrapcut=`80`]]
limit Limits a string to a certain number of characters. Defaults to 100. [[+description:limit=`50`]]
ellipsis Adds an ellipsis to and truncates a string if it's longer than a certain number of characters. Defaults to 100. [[+description:ellipsis=`50`]]
tag Displays the raw element without the :tag. Useful for documentation. [[+showThis:tag]]
math Returns the result of an advanced calculation (expensive on processor. not recommended) Removed in Revolution 2.2.6.
add,increment,incr Returns input incremented by option (default: +1) [[+downloads:incr]]
[[+blackjack:add=`21`]]
subtract,decrement,decr Returns input decremented by option (default: -1) [[+countdown:decr]]
[[+moneys:subtract=`100`]]
multiply,mpy Returns input multiplied by option (default: *2) [[+trifecta:mpy=`3`]
divide,div Returns input divided by option (default: /2) Does not accept 0. [[+rating:div=`4`]]
modulus,mod Returns the option modulus on input (default: %2, returns 0 or 1) [[+number:mod]] or [[+number:mod=`3`]]
ifempty,default,empty, isempty Returns the input value if empty [[+name:default=`anonymous`]]
notempty, !empty, ifnotempty, isnotempty Returns the input value if not empty [[+name:notempty=`Hello [[+name]]!`]]
nl2br Converts a new line character (\n) to an html
element. Use this if you're taking in input, you think that there should be new lines in it, and there aren't. Similar to PHP's nl2br.
[[+textfile:nl2br]]
date Formats a unix timestamp into a different format. Similar to PHP's strftime. Value is format. See Date Formats. [[+birthyear:date=`%Y`]]
strtotime Converts a date string into a unix timestamp. Useful to combine this with the date output filter. Similar to PHP's strtotime. Takes in a date. See Date Formats. [[+thetime:strtotime]]
fuzzydate Returns a pretty date format with yesterday and today being filtered. Takes in a date. [[+createdon:fuzzydate]]
ago Returns a pretty date format in seconds, minutes, weeks or months ago. Takes in a date (strtotime). [[+createdon:date=`%d-%m-%Y`:ago]]
md5 Creates an MD5 hash of the input string. Similar to PHP's md5. [[+password:md5]]
cdata Wraps the text with CDATA tags [[+content:cdata]]
userinfo Returns the requested user data. The element must be a modUser ID. The value field is the column to grab, e.g. fullname, email. See Examples below. [[+modx.user.id:userinfo=`username`]]
isloggedin Returns true if user is authenticated in this context. [[+modx.user.id:isloggedin]]
isnotloggedin Returns true if user is not authenticated in this context. [[+modx.user.id:isnotloggedin]]
toPlaceholder
Puts the input value into the passed placeholder. Does not prevent the output of the TV value, so add [[*someTV:toPlaceholder=`placeholder`:notempty=``]] if you don't want to output the value of the TV itself. ?[[*someTV:toPlaceholder=`placeholder`]]
cssToHead
Put a < link > element into < head >, where the input value is placed inside the href attribute.
Uses modX.regClientCSS.
[[+cssTV:cssToHead]]
htmlToHead
Insert a block of HTML code in the header of the page, before < / head >.
Uses modX.regClientStartupHTMLBlock
[[+htmlTV:htmlToHead]]
htmlToBottom
Insert HTML code at the end of the page, before < / body >.
Uses modX.regClientHTMLBlock.
[[+htmlTV:htmlToBottom]]
jsToHead
Insert JS code (or a link) in the header of the page, before < / head >.
Uses modX.regClientStartupScript.
[[+jsTV:jsToHead]]
jsToBottom
Insert JS code (or a link) at the end of the page, before < / body >.
Uses modX.regClientScript.
[[+jsTV:jsToBottom]]
urlencode Converts the input into a URL-friendly string similar to how an HTML form would do so. Similar to PHP's urlencode [[+mystring:urlencode]]
urldecode Converts the input from an URL-friendly string Similar to PHP's urldecode [[+myparam:urldecode]]

Caching

In general, any content in a placeholder that you think might change dynamically should be uncached. For example:

[[+placeholder:default=`A default value!`]]

This means that this could sometimes be empty, and sometimes not. Why would you ever want that cached? That would eliminate the point of the output modifier.

Sometimes, output modifiers can be used on a cached placeholder - but only if you're calling the Snippet that sets them cached as well. Otherwise, you're performing an illogical maneuver - trying to cache statically something that was never meant to be static.

In general, the rule is: If you set a placeholder in an uncached Snippet, the placeholder needs to be uncached as well if you expect the content of the placeholder to differ.

Using an Output Modifier with Tag Properties

If you have properties on the tag, you'll want to specify those after the modifier:

[[!getResources:default=`Sorry - nothing matched your search.`?
   &tplFirst=`blogTpl`
   &parents=`2,3,4,8`
   &tvFilters=`blog_tags==%[[!tag:htmlent]]%`
   &includeTVs=`1`]]

Creating a Custom Output Modifier

Also, Snippets can be used as custom modifiers. Simply put the Snippet name instead of the modifier. Example with a snippet named 'makeExciting' that appends a variable amount of exclamation marks:

[[*pagetitle:makeExciting=`4`]]

This document variable call with an output modifier will pass these properties to the snippet:

Param Value Example Result
input The element's value. The value of [[*pagetitle]]
options Any value passed to the modifier. '4'
token The type of the parent element. * (the token on `pagetitle`)
name The name of the parent element. pagetitle
tag The complete parent tag. [[*pagetitle:makeExciting=`4`]]

Here is a sample implementation for our snippet makeExciting:

$defaultExcitementLevel = 1;
$result = $input;
if ( true === isset($options) ) {
$numberOfExclamations = $options;
} else {
$numberOfExclamations = $defaultExcitementLevel;
}
for ( $i = $numberOfExclamations; $i > 0; $i-- ) {
  $result = $result . '!';
}
return $result;

The return value of the call will be whatever the snippet returns. For our example, the result will be the value of the pagetitle document variable appended with four exclamation marks.

The original input value will be returned if the snippet returns an empty string.

Chaining (Multiple Output Filters)

A good example of chaining would be to format a date string to another format, like so:

[[+mydate:strtotime:date=`%Y-%m-%d`]]

Directly accessing the modx_user_attributes table in the database using output modifiers instead of a Snippet can be accomplished simply by utilizing the userinfo modifier. Select the appropriate column from the table and specify it as the property of the output modifier, like so:

User Internal Key: [[!+modx.user.id:userinfo=`internalKey`]]<br />
User name: [[!+modx.user.id:userinfo=`username`]]<br />
Full Name: [[!+modx.user.id:userinfo=`fullname`]]<br />
Role:  [[!+modx.user.id:userinfo=`role`]]<br />
E-mail: [[!+modx.user.id:userinfo=`email`]]<br />
Phone: [[!+modx.user.id:userinfo=`phone`]]<br />
Mobile Phone: [[!+modx.user.id:userinfo=`mobilephone`]]<br />
Fax: [[!+modx.user.id:userinfo=`fax`]]<br />
Date of birth: [[!+modx.user.id:userinfo=`dob`:date=`%Y-%m-%d`]]<br />
Gender: [[!+modx.user.id:userinfo=`gender`]]<br />
Country: [[+modx.user.id:userinfo=`country`]]<br />
State: [[+modx.user.id:userinfo=`state`]]<br />
Zip Code: [[+modx.user.id:userinfo=`zip`]]<br />
Photo: [[+modx.user.id:userinfo=`photo`]]<br />
Comment: [[+modx.user.id:userinfo=`comment`]]<br />
Password: [[+modx.user.id:userinfo=`password`]]<br />
Cache Password: [[+modx.user.id:userinfo=`cachepwd`]]<br />
Last Login: [[+modx.user.id:userinfo=`lastlogin`:date=`%Y-%m-%d`]]<br />
The Login:[[+modx.user.id:userinfo=`thislogin`:date=`%Y-%m-%d`]]<br />
Number of Logins: [[+modx.user.id:userinfo=`logincount`]]

[[!+modx.user.id]] defaults to the currently logged in user ID. You can of course replace that with [[*createdby]] or other resource field or placeholders that return a numeric ID representing a user.

Note that the user ID and username is already available by default in MODx, so you dont need to use the "userinfo" modifier:
[[!+modx.user.id]] - Prints the ID
[[!+modx.user.username]] - Prints the username
	

You will most likely want to call these uncached (see note about caching above) to prevent unexpected results.

See Also