Configuration options

The configuration for GNU social is stored in the database table config.

A Web based configuration panel exists so the site admin can configure GNU social. The preferred method for changing config options is to use this panel.

A command-line script, set_config.php, can be used to set individual configuration options. It's in the bin/ directory.

Almost all configuration options are made through a two-dimensional associative array, cleverly named $config. A typical configuration line will be:

$config['section']['setting] = value;

The following documentation describes each section and setting.

site

This section is a catch-all for site-wide variables.

name (string, required, defaults to the value provided in the configre script, sitename): the name of your site, like 'YourCompany Microblog'.
server (string, required, defaults to the value provided in the configre script, sitename): the server domain, like 'example.net'.
notice (string, default null): A plain string that will appear on every page. A good place to put introductory information about your service, or info about upgrades and outages, or other community info. Any HTML will be escaped.
theme (string, default 'default'): Theme for your site (see Theme section).
logo (string, default null): URL of an image file to use as the logo for the site. Overrides the logo in the theme, if any.
language (string, default "en"): default language for your site. Defaults to English. Note that this is overridden, if enabled in the following setting, if a user is logged in and has selected a different language or if the user is NOT logged in, but their browser requests a different langauge. Since pretty much everybody's browser requests a language, that means that changing this setting has little or no effect in practice.
detect_language (boolean, default true): whether to use the most appropriate language depending on the requester's browser preferences.
languages (array, default null): A list of languages supported on your site. Typically you'd only change this if you wanted to disable support for one or more languages:

unset($config['site']['languages']['de']) will disable support for German.
email (string, required): contact email address for your site. By default, it's extracted from your Web server environment or the value provided in the configure script; you may want to customize it.
recovery_disclose (boolean, default false): whether to confirm if the email exists when attempting to login. Recommended to keep it false, for some privacy.
timezone (string, default 'UTC'): default timezone for message display. Users can set their own time zone. Defaults to 'UTC', which is a pretty good default.
brought_by (string, default null): text used for the "brought by" link.
brought_by_url (string, default null): name of an organization or individual who provides the service. Each page will include a link to this name in the footer or sidebar. A good way to link to the blog, forum, wiki, corporate portal, or whoever is making the service available.
closed (boolean, default false): If set to 'true', will disallow registration on your site. This is a easy way to restrict accounts to only one individual or group; just register the accounts you want on the service, then set this variable to 'true'.
invite_only (boolean, default false): If set to 'true', will only allow registration if the user was invited by an existing user.
private (boolean, default false): If set to 'true', anonymous users will be redirected to the 'login' page. Also, API methods that normally require no authentication will require it. Note that this does not turn off registration; use 'closed' or 'invite_only' for that behaviour.
ssl (enum['always', 'sometimes', 'never'], default always'): Whether to use SSL and https:// URLs for some or all pages.

Possible values are 'always' (use it for all pages), 'never' (don't use it for any pages), or 'sometimes' (use it for sensitive pages that include passwords like login and registration, but not for regular pages).
ssl_proxy (string|boolean, default false): Whether to force GNUsocial to think it is HTTPS when the server gives no such information. I.e. when you're using a reverse proxy that adds the encryption layer but the webserver that runs PHP isn't configured with a key and certificate. If a string is given, it will be used as the URL of the proxy server.
duplicate_time_limit (integer, default 60): minimum time allowed for one person to say the same thing twice. Default 60s. If it happens faster than this, it's considered a user or UI error.
text_limit (integer, default 1000): default max size for texts in the site. Can be fine-tuned for notices, messages, profile bios and group descriptions. Zero indicates no limit.
x-static-delivery (string, default null): when a string, use this as the header with which to serve static files. Possible values are 'X-Sendfile' (for Apache and others) and 'X-Accel-Redirect' (for nginx).

security

hash_algos (array, default ['sha1', 'sha256', 'sha512']): set to null for anything that hash_hmac() can handle; can be any combination of the result of hash_algos()

db

mirror (array, default null): you can set this to an array of database connection URIs. If it's set, load will be split among these, and replication will be enabled.

fix

fancy_urls (boolean, default true): fix any non-facy url to the correct form, when possible.
http (boolean, default true): fixe any http links to https.

queue

You can configure the software to queue time-consuming tasks, like sending out SMS, email or XMPP messages, for off-line processing.

enabled (boolean, default true): Whether to uses queues.
daemon (boolean, default false): Whether to use queuedaemon. False means you'll use OpportunisticQM plugin.
threads (int): How many queue processes to run. Defaults to number of cpu cores in unix-like systems or 1 on other OSes.
subsystem (enum["db", "stomp", "redis"], default 'db'): Which kind of queueserver to use. Values include "db" for our database queuing (no other server required), "stomp" for a stomp server amd "redis" for a Redis server.
basename (string, default '/queue/gnusocial/'): a root name to use for queues (stomp and redis only). Typically something like '/queue/sitename/' makes sense. If running multiple instances on the same server, make sure that either this setting or $config['site']['nickname'] are unique for each site to keep them separate.
control_channel (string, default '/topic/gnusocial/control'): the control channel used for different queue processes to communicate.
monitor (string, default null): URL endpoint to monitor queue status
soft_limit (string, default '90%'): an absolute or relative "soft memory limit"; daemons will restart themselves gracefully when they find they've hit this amount of memory usage. Relative means a percentage of PHP's global memory_limit setting.
spawn_delay (integer, default 1): seconds to wait between deamon restarts.
debug_memory (boolean, default false): log daemon's memory usage.
stomp_server (string, default null): URI for stomp server. Something like "tcp://hostname:61613". More complicated ones are possible; see your stomp server's documentation for details.
stomp_username (string, default null): username for connecting to the stomp server.
stomp_password (string, default null): password for connecting to the stomp server.
stomp_persistent (boolean, default true): Keep items across queue server restart, if enabled. Note: Under ActiveMQ, the server configuration determines if and how persistent storage is actually saved. Not all stomp servers support persistence.
stomp_transactions (boolean, default true): use transactions to aid in error detection. A broken transaction will be seen quickly, allowing a message to be redelivered immediately if a daemon crashes. Not all stop servers support transactions.
stomp_acks (boolean, default true): send acknowledgements to aid in flow control. An acknowledgement of successful processing tells the server we're ready for more and can help keep things moving smoothly. This should not be turned off when running with ActiveMQ, (it breaks if you do), but if using another message queue server that does not support acknowledgements you might need to disable this.
stomp_manual_failover (boolean, default true): if multiple servers are listed, treat them as separate (enqueue on one randomly, listen on all).
max_retries (integer, default 10): for stomp, drop messages after N failed attempts to process.
dead_letter_dir (string, default null): for stomp, optional directory to dump data on failed queue processing events after discarding them.

avatar

server (string, default null): If set, defines another server where avatars are stored. Note that the dir still has to be writeable. You'd typically use this to split HTTP requests on the client to speed up page loading, either with another virtual server or with an NFS or SAMBA share. Clients typically only make 2 connections to a single server at a time https://www.w3.org/Protocols/rfc2616/rfc2616-sec8.html#sec8.1.4, so this can parallelize the job.
url_base (string, 'default '/avatar/'): URL where avatars can be found.
ssl (boolean, default null): Whether to access avatars using HTTPS. Defaults to null, meaning to guess based on site-wide SSL settings.
dir (string, default 'file/avatar/'): Directory to save avatar files to.
max_size_px (integer, default 300): Maximum width or height for user avatars, in pixels

javascript

server (string, default null): You can speed up page loading by pointing the javascript file lookup to another server (virtual or real). Defaults to NULL, meaning to use the site server.
url_base (string default '/js/'): URL part for JavaScript files.
ssl (boolean, default null): Whether to use SSL for JavaScript files. Default is null, which means guess based on site SSL settings.
bust_frames (boolean, default true): If true, all web pages will break out of framesets. If false, can comfortably live in a frame or iframe... probably.

attachments

server (string, default null): Server name to use when creating URLs for uploaded files. Defaults to null, meaning to use the default Web server. Using a virtual server here can speed up Web performance.
url_base (string, default '/file/'): URL path, relative to the server, to find files. Defaults to main path + '/file/'.
ssl (boolean, default null): Whether to use HTTPS for file URLs. Defaults to null, meaning to use other SSL settings.
dir (string, default '/file/uploads/'): Directory accessible to the Web process where uploads should go.
supported (array): An associative array of mime types you accept to store and distribute, like 'image/gif', 'video/mpeg', 'audio/mpeg', to the corresponding file extension. Make sure you setup your server to properly recognize the types you want to support. It's important to use the result of calling image_type_to_extension for the appropriate image type, in the case of images. This is so all parts of the code see the same file extension for each image type (jpg vs jpeg). For example, to enable BMP uploads, add this to the config.php file: image_type_to_mime_type(IMAGETYPE_BMP) => image_type_to_extension(IMAGETYPE_BMP); See https://www.php.net/manual/en/function.image-type-to-mime-type.php for a list of such constants. If a filetype is not listed there, it's possible to add the mimetype and the extension by hand, but they need to match those returned by the file command.

For quotas, be sure you've set the upload_max_filesize and post_max_size in php.ini to be large enough to handle your upload. In httpd.conf (if you're using apache), check that the LimitRequestBody directive isn't set too low (it's optional, so it may not be there at all).

file_quota (integer, defaults to minimum of 'post_max_size', 'upload_max_filesize', 'memory_limit'): Maximum size for a single file upload, in bytes. A user can send any amount of notices with attachments as long as each attachment is smaller than file_quota.
user_quota (integer, default 200M): Total size, in bytes, a user can store on this server. Each user can store any number of files as long as their total size does not exceed the user_quota.
monthly_quota (integer, default 20M): Total size in bytes that a user can upload each month.
uploads (boolean, default true): Whether to allow uploading files with notices.
show_html (boolean, default true): Whether to show (filtered) text/html attachments (and oEmbed HTML etc.). Doesn't affect AJAX calls.
show_thumbs (boolean, default true): Whether to show thumbnails in notice lists for uploaded images, and photos and videos linked remotely that provide oEmbed info.
process_links (boolean, default true): Whether to follow redirects and save all available file information (mimetype, date, size, oembed, etc.).

ext_blacklist (array, default []): associative array to either deny certain extensions or change them to a different one. For example:

$config['attachments']['extblacklist']['php'] = 'phps';  // this turns .php into .phps
$config['attachments']['extblacklist']['exe'] = false;   // this would deny any uploads
                                                         // of files with the "exe" extension

filename (string, default hash): Name for new files, one of: 'upload', 'hash'.
memory_limit (string, default '1024M'): PHP memory limit to use temporarily when handling images

thumbnail

server (string, default null): Server name from which to serve thumbnails. Defaults to null, meaning to use the default Web server. Using a virtual server here can speed up Web performance.
url_base (string, default '/thumb/'): URL path, relative to the server, to find files.
ssl (boolean, default null): Whether to use HTTPS for thumbnail URLs. Defaults to null, meaning to use other SSL settings.
dir (string, default '/file/thumbnails/'): Path where to store thumbnails.
crop (boolean, default false): Whether to crop thumbnails (or scale them down)
max_size_px (integer, default 1000): Thumbnails with an edge greater than this will not be generated.
width (integer, default 450): Width for generated thumbnails.
height (integer, default 600): Heigth for generated thumbnails.
upscale (boolean, default false): Whether to generate thumbnails bigger than the original.
animated (boolean, default false): Whether to allow animated thumbnails.

theme

server (string, default null): Like avatars, you can speed up page loading by pointing the theme file lookup to another server (virtual or real). The default of null will use the same server as PA.
url_base (string, default '/theme'): Path part of theme URLs, before the theme name. Relative to the theme server. It may make sense to change this path when upgrading, (using version numbers as the path) to make sure that all files are reloaded by caching clients or proxies.
ssl (boolean, default null): Whether to use SSL for theme elements. Default is null, which means guess based on site SSL settings.
dir (string, default "./themes"): Directory where theme files are stored. Used to determine whether to show parts of a theme file. Defaults to the theme subdirectory of the install directory.

plugins

server (string, default null): Server to find static files for a plugin when the page is plain old HTTP. Defaults to site/server (same as pages). You can use this to move plugin CSS and JS files to a CDN.
url_base (string, default '/plugins/'): Path to the plugin files. Expects that each plugin will have a subdirectory at plugins/NameOfPlugin. Change this if you're using a CDN.
ssl (boolean, default null) Whether to use ssl for files served by plugins.
core (associative array, default TODO): Core GNU social modules, cannot be disabled.
default: (associative array, default TODO): Mapping from plugin name to array of plugin arguments.
locale_path (string, default null): Path for finding plugin locale files. In the plugin's directory by default.

license

The default license to use for your users' notices. The default is the Creative Commons Attribution 4.0 license, which is probably the right choice for any public site. Note that some other servers will not accept notices if you apply a stricter license than this.

type (enum["cc", "allrightsreserved", "private"], default 'cc'): One of 'cc' (for Creative Commons licenses), 'allrightsreserved' (default copyright), or 'private' (for private and confidential information).
owner (string|boolean, default null): For 'allrightsreserved' or 'private', an assigned copyright holder (for example, an employer for a private site). Use true to attribute it to the poster.
url (string, default 'https://creativecommons.org/licenses/by/4.0/'): URL of the license, used for links.
title (string, default 'Creative Commons Attribution 4.0'): Title for the license.
image (string, default '/theme/licenses/cc_by_4.0.png'): URL path for the license image.

mail

This is for configuring out-going email.

backend (enum["mail", "sendmail", "smtp"], default 'mail'): The backend to use for mail. We recommend SMTP where your setup supports it as it is of the three the more difficult one for script exploits to abuse (relatively speaking - they all have potential problems.).
params (array, default null): If the mail backend requires any parameters, you can provide them in this array.
domain_check (boolean, default true): Check email origin is valid.

nickname

blacklist (array, default ['doc', 'main', 'avatar', 'theme']): an array of strings for usernames that may not be registered. You may want to add others if you have other software installed in a subdirectory of GNU social or if you just don't want certain words used as usernames.
featured (array, default null): an array of nicknames of 'featured' users of the site. Can be useful to draw attention to well-known users, or interesting people, or whatever.

profile

banned (array, defualt []): array of users to hell-ban
bio_text_limit (integer, default null): Max character length of bio; 0 means no limit; null means to use the site text limit default.
allow_nick_change (boolean, default false): Whether to allow users to change their nickname.
allow_private_stream (boolean, default true): Whether users can set their streams to private, so only followers can see it.
backup (boolean, default false): Whether users can backup their own profiles. Can cause DoS.
restore (boolean, default false): Whether users can restore their profiles from backup files. Can cause DoS.
delete (boolean, default false): Whether users can delete their own accounts.
move (boolean, default false): Whether users can move their accounts to another server.

image

jpegquality {integer, default 85}: default quality to use when reencoding images as jpeg.

theme_upload

enabled (boolean, default true): Whether to allow users to upload themes
formats (array, default ['zip', 'tar', 'gz', 'tar.gz']): Formats to allow

foaf

mbox_sha1sum (boolean, default false): whether to include this box in the FOAF protocol page

public

For configuring the public stream.

local_only (boolean, default false): If set to true, only messages posted by users of this instance (rather than remote instances) are shown in the public stream.
blacklist (array, default []): An array of IDs of users to hide from the public stream. Useful if you have someone making an excessive amount of posts to the site or some kind of automated poster, testing bots, etc.
exclude_sources (array, default []): Sources of notices that should be kept off of the public feed (because they're from automatic posters, for instance).

throttle

For notice-posting throttles.

enabled (boolean, default true): Whether to throttle posting.
count (integer, default 20): Each user can make this many posts in 'timespan' seconds. So, if count is 100 and timespan is 3600, then there can be only 100 posts from a user every hour.
timespan (integer, default 600): See 'count'.

invite

enabled (boolean, default true): Whether to allow users to send invites.

daemon

piddir (string, default sys_get_temp_dir()): Directory that daemon processes should write their PID file (process ID) to.
user (string|integer, default false): If set, the daemons will try to change their effective user ID to this user before running. Probably a good idea, especially if you start the daemons as root.
group (string|integer, default false): If set, the daemons will try to change their effective group ID to this named group.

ping

Using the "XML-RPC Ping" method initiated by weblogs.com, the site can notify third-party servers of updates.

notify (array, default []): An array of URLs for ping endpoints.
timeout (integer, default 2): Interval in seconds between notifications.

new_users

default_subscriptions (array, default null): Nickname of user accounts to automatically subscribe new users to. Typically this would be a system account for e.g. service updates or announcements. Users are able to unsub if they want.
welcome_user (string, default null): Nickname of a user account that sends welcome messages to new users.

N.B. If either of these special user accounts are specified, the users should be created

 before the configuration is updated.

linkify

bare_domain (boolean, default false): Prepend schema to any linked domains (a href, not display text).
linkify_ipv4 (boolean, default false): Convert IPv4 addresses into hyperlinks.
linkify_ipv6 (boolean, default false): Convert IPv6 addresses into hyperlinks.

group

max_aliases (integer, default 3): Maximum number of aliases a group can have. Set to 0 or less to prevent aliases in a group.
description_limit (integer, default null): Maximum number of characters to allow in group descriptions. null means to use the site-wide text limits. 0 means no limit.

people_tag

max_tags (integer, default 100): Maximum number of people tags a user can create.
max_people (integer, default 500): Maximum number of people with the same user people tag.
allow_tagging (associative array, default ['local' => true, 'remote' => true])>: Which kind of user to allow tagging.
description_limit (integer, default null): Maximum tag description lenght.

search

type (enum('fulltext', 'like'), default 'like'): type of search. Ignored if PostgreSQL is enabled. Can either be 'fulltext' or 'like'. The former is faster and more efficient but requires the lame old MyISAM engine for MySQL. The latter will work with InnoDB but could be miserably slow on large systems.

html_filter

tags (array, default ['img', 'video', 'audio', 'script']): Remove tags from user/remotely generated HTML.

notice

content_limit (integer, default null): Max length of the plain-text content of a notice. Null means to use the site-wide text limit. 0 means no limit.
allow_private (boolean, default false): Whether to allow users to post notices visible only to their subscribers.
hide_banned (boolean, default true): Whether to hide hell-banned users' notices.

message

content_limit (integer, default null): Max length of the plain-text content of a message. Null means to use the site-wide text limit. 0 means no limit.

location

share (enum('always', 'user', 'never'), default 'user'): Whether to share user location. 'user' means each user can choose.

admin

panels (array, default ['site', 'user', 'paths', 'access', 'sessions', 'sitenotice', 'license', 'plugins']): Which panels to include in the admin tab.

single_user

If an installation has only one user, this can simplify a lot of the interface. It also makes the user's profile the root URL.

enabled (boolean, default value provided in configure): Whether to run in "single user mode".
nickname (string, default null): nickname of the single user. If no nickname is specified, the site owner account will be used (if present).

robots_txt

crawl_delay (integer, default 0): if non-zero, this value is provided as the 'Crawl-Delay:' for the robots.txt file. see https://en.wikipedia.org/wiki/Robots_exclusion_standard#Crawl-delay_directive for more information. Default is zero, no explicit delay.
disallow(array, default ['main', 'settings', 'admin', 'search', 'message']): Array of paths to disallow. Ignored when site is private, in which case the entire site ('/') is disallowed.

nofollow

We optionally put 'rel="nofollow"' on some links in some pages. The following configuration settings let you fine-tune how or when things are nofollowed. See http://en.wikipedia.org/wiki/Nofollow for more information on what 'nofollow' means.

subscribers (boolean, default true): Whether to nofollow links to subscribers on the profile and personal pages.
members (boolean, default true): Whether to nofollow links to members on the group page. Default true.
peopletag (boolean, default true): Whether to nofollow links to people listed in the peopletag page. Default true.
external (enum('always', 'sometimes', 'never'), default 'sometimes'): External links in notices. One of three values: 'always', 'sometimes', 'never'. If 'sometimes', then external links are not nofollowed on profile, notice, and favorites page. Default is 'sometimes'.

url_shortener

service (string, default 'internal'): URL shortening service to use by default. Users can override individually.
max_url_length (integer, default 100): If an URL is strictly longer than this limit, it will be shortened. Note that the URL shortener service may return an URL longer than this limit. Users can override. If set to 0, all URLs will be shortened.
max_notice_length (integer, default null): If a notice is strictly longer than this limit, all URLs in the notice will be shortened. Users can override this.

http

ssl_cafile (string, default '/docker/certbot/files/live/'): location of the CA file for SSL connections. If not set, peers won't be able to verify our identity.
timeout (integer, default ini_get('default_socket_timeout')): Timeout in seconds when to close a connection.
proxy_host (string, default null): Host to use for proxying HTTP requests. If null,
```
doesn't use an HTTP proxy.
```
proxy_port (integer, default null): Port to use to connect to HTTP proxy host.
proxy_user (string, default null): Username to use for authenticating to the HTTP proxy.
proxy_password (string, default null): Password to use for authenticating to the HTTP proxy.
proxy_auth_scheme (TODO): Scheme to use for authenticating to the HTTP proxy.

discovery

CORS (boolean, default false): Whether to allow Cross-Origin Resource Sharing for service discovery (host-meta, XRD, etc.)

performance

high (boolean, default fakse): Disables some high-performance-intensity components.

login_command

enabled (boolean, default false): Whether to enable users to send the text 'login' to the site through any channel and receive a link to login to the site automatically in return. Possibly useful for users who primarily use an XMPP or SMS interface. Note that the security implications of this are pretty serious. You should enable it only after you've convinced yourself that it is safe.

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