Phabricator project: #Echo


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MediaWiki extensions manual
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Release status: stable

Implementation Notify
Description Implements Echo, MediaWiki's next-generation notification subsystem.
Author(s) Andrew Garrett, Ryan Kaldari, Benny Situ
Latest version continuous updates
MediaWiki 1.23+
Database changes Yes
Tables echo_email_batch
License MIT License
Hooks used

Translate the Echo extension if it is available at

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The Echo extension provides an in-wiki notification system that can be used by other extensions. Thanks and Flow are two MediaWiki extensions that make use of Echo. See Notifications for a full description of what this extension does.


  • Download and place the file(s) in a directory called Echo in your extensions/ folder.
  • Add the following code at the bottom of your LocalSettings.php:
require_once "$IP/extensions/Echo/Echo.php";


In addition to setting default user preferences, you can also use the AddNewAccount hook to change user preferences on signup. That allows setting different user preferences going forward without affecting existing users.

See the release notes when upgrading.

See Special:DisplayNotificationsConfiguration for local details.

Configuration settings in Echo.php
parameter default comment
$wgEchoEnableEmailBatch true Whether to turn on email batch function
$wgEchoHelpPage URL for more information about the Echo notification system
$wgEchoUseJobQueue false
  • true: Defer web and email notification delivery via job queue.
  • false: Deliver notifications immediately
$wgEchoEmailFooterAddress The organization address. Should be defined in LocalSettings.php
$wgNotificationSender $wgPasswordSender The email address for both "from" and "reply to" on email notifications. Should be defined in LocalSettings.php
$wgNotificationSenderName $wgPasswordSenderName Name for "from" on email notifications. Should be defined in LocalSettings.php
$wgNotificationReplyName No Reply Name for "reply to" on email notifications. Should be defined in LocalSettings.php
$wgEchoCluster false Use the main db if this is set to false, to use a specific external db, just use any key defined in $wgExternalServers
$wgEchoSharedTrackingDB false Shared database to use for keeping track of cross-wiki unread notifications; false to not keep track of it at all
$wgEchoSharedTrackingCluster false Cluster the shared tracking database is located on; false if it is on the main one. Must be a key defined in $wgExternalServers
$wgEchoMaxUpdateCount 2000 The max number of notifications allowed for a user to do a live update, this is also the number of max notifications allowed for a user to have.
$wgEchoBundleEmailInterval 0 The time interval between each bundle email in seconds; set a small number for test wikis. This should be set to 0 to disable email bundling if there is no delay queue support
$wgEchoNewMsgAlert true Whether or not to enable a new talk page message alert for logged in users.
$wgEchoShowFooterNotice false Whether or not to show the footer feedback notice in the notifications popup
$wgEchoFooterNoticeURL '' A URL for the survey that appears in the footer feedback notice in the notification popup
    'all' => array(
        'web' => true,
        'email' => true,
   // Only send web notification for welcome event
    'welcome' => array(
        'email' => false,
    // No need to get a email when another user sends to me
    'emailuser' => array(
        'web' => true,
        'email' => false,
Define which output formats are available for each notification category
    'web' => array( 'EchoNotifier', 'notifyWithNotification' ),
    'email' => array( 'EchoNotifier', 'notifyWithEmail' ),
Definitions of the different types of notification delivery that are possible. Each definition consists of a class name and a function name. See also: EchoNotificationController class.
$wgEchoAgentBlacklist array() List of usernames which will not trigger notifications
$wgEchoOnWikiBlacklist Echo-blacklist Page location of community maintained blacklist within NS_MEDIAWIKI containing one username per line which will not trigger notifications. Set to null to disable.
$wgEchoPerUserWhitelistFormat  %s/Echo-whitelist An sprintf format of the location of the per-user notification agent whitelist within the NS_USER namespace. %s will be replaced with the users name. The whitelists must contain one username per line which will always trigger notifications regardless of their existence in the blacklists. Set to null to disable.
$wgEchoUseCrossWikiBetaFeature false Feature flag for the cross-wiki notifications beta feature

If this is true, the cross-wiki notifications preference will appear in the BetaFeatures section; if this is false, it'll appear in the Notifications section instead.

This does not control whether cross-wiki notifications are enabled by default. For that, use $wgDefaultUserOptions['echo-cross-wiki-notifications'] = true;

$wgEchoNotificationCategories See Echo.php Define the categories that notifications can belong to. Categories can be assigned the following parameters. All parameters are optional:
  • priority: Controls the order in which notifications are displayed in preferences and batch emails. Priority ranges from 1 to 10. If the priority is not specified, it defaults to 10, which is the lowest.
  • no-dismiss: disables the dismissability of notifications in the category. It can either be set to an array of output formats (see $wgEchoNotifiers) or an array containing 'all'.
  • usergroups: Specifies an array of usergroups eligible to receive the notifications in the category. If no usergroups parameter is specified, all groups are eligible.

If a notifications type doesn't have a category parameter, it is automatically assigned to the other category which is lowest priority and has no preferences or dismissibility.

$echoIconPath Echo/modules/icons
$wgEchoNotificationIcons See Echo.php Defines icons, which are 30x30 images. This is passed to BeforeCreateEchoEvent so extensions can define their own icons with the same structure. It is recommended that extensions prefix their icon key. An example is myextension-name. This will help avoid namespace conflicts.

You can use either a path or a url, but not both. The value of 'path' is relative to $wgExtensionAssetsPath.

The value of 'url' should be a URL.

You should customize the site icon URL, which is: $wgEchoNotificationIcons['site']['url']

$wgEchoNotifications See Echo.php Define the event types for echo. Event definitions are in the form of 'event-name' => array( ... ).
  • category: Defines the category the event belongs to. Defaults to 'other'.
  • group: Defaults to 'neutral'.
  • bundle: Define which output formats are available for bundling.
  • formatter-class: Define which class is used to format the various notification messages. Defaults to EchoBasicFormatter

The following parameters are specific to EchoBasicFormatter and all formatters which extend from it.

  • title-<message/params>: Required parameter specifying title and title parameters for the Notification page
  • bundle-<message/params>: Title displayed on the flyout
  • email-subject-<message/params>: Bundle title for the archive page and flyout.
  • email-body-<message/params>: Notification email body.
  • email-body-batch-<message/params>: Notifications email body when sent in batch mode.
  • email-body-batch-bundle-<message/params>: Notification body when sent as part of a bundled notification.
  • payload: Notification payload data, E.g., Summary.
  • icon: Notification icon for the event type.
$wgDefaultUserOptions['echo-show-alert'] true Default user preference for showing the special talk page alert bar
$wgDefaultUserOptions['echo-email-frequency'] 0 How often to send emails, by default. By default, send emails for each notification as they come in
$wgDefaultUserOptions['echo-dismiss-feedback-alert'] 0 Ensures the feedback alert is visible by default. Do not change; to disable, use $wgEchoShowFooterNotice .
$wgDefaultUserOptions['echo-email-format'] Depends on $wgAllowHTMLEmail Default user preference for whether to use HTML or text email
$wgDefaultUserOptions["echo-subscriptions-email-{$category}"] false for most categories; depends Default user preference for whether to notify via email for a particular category
$wgDefaultUserOptions["echo-subscriptions-web-{$category}"] true for most categories; depends Default user preference for whether to notify via web for a particular category
$wgEchoConfig See Echo.php Configuration for EventLogging. Individual schemas can be disabled.


See the architecture section of the feature page.


Notification blacklist/whitelist

There are occasionally specific users, typically bots, which perform maintenance tasks that should not generate notifications. To handle these cases, users can be globally blacklisted from the LocalSettings.php file (or InitialiseSettings.php in the case of WMF wikis):

 $wgEchoAgentBlacklist = array( 'GonzoBot', 'CrazyGuy' );

There is also an on-wiki blacklist that can be maintained by the wiki's community. The location of the global on-wiki blacklist defaults to MediaWiki:Echo-blacklist. Individual users can override the blacklist by creating a whitelist. The whitelist location defaults to Special:MyPage/Echo-whitelist. All on-wiki lists expect to receive one case-specific username per line with no special markup or prefixes. For example:

"Mention" option

One of the notification types that this extension allows is: "Notify me when someone links to my user page." It might not be obvious to some users, but this particular notification only works when the person linking to another user's page also signs (~~~~) the post.

After installation of the extension, a new tab "Notifications" is created in a user's Special:Preferences page. Under the section "Notify me about these events", in front of the "Mention" option, the hoverbox states: "Notify me when someone links to my user page." If an administrator feels, that the requirement for signing the post isn't obvious in this help text, it can be modified by changing the text in the Wiki's MediaWiki:Echo-pref-tooltip-mention page.

(Tested on MediaWiki v1.26.2 on March 15, 2016)


  • notification - Any individual notice that is delivered by Echo
  • message - A notification about activity in a Flow discussion
  • alert - Any notification other than a message

See also[edit]