Manual:$wgUrlProtocols

Site customization: $wgUrlProtocols
Defines the protocols which are supported and translated in HTML by the mediawiki parser.
Introduced in version:	1.5.0 (r10229)
Removed in version:	still in use
Allowed values:	array of strings string containing a regular expression before 1.6.0
Default value:	(see below)

Other settings: Alphabetical | By Function

Details

Defines the URL protocols that MediaWiki will recognize. This is used in lots of places. The most visible effect is it determines what protocols are allowed for external links: unrecognized protocols are ignored, no link is generated. However, it's used in many other places too, including the code for Special:LinkSearch, and utility functions like wfParseUrl() that are used in a wide variety of different places.

Some examples that don't work (because "test://" is not defined as a valid protocol):

• test://www.example.com
• [test://www.example.com]
• [test://www.example.com link text]

 Note: some browsers, like Mozilla Firefox, will not follow file URLs on pages that have been loaded via HTTP. This is a security measure. See this mozillaZine article for more information, including some hints on how to overcome this restriction.

 Note: most browsers do not support "remote file" URLs like file://host/share (only Internet Explorer handles these per default. For Firefox, a plugin is required or use exactly 5 slashes like file://///host/share, see [1])

Warning:

In MediaWiki 1.20.2+, adding "file:" without trailing slashes to $wgUrlProtocols will break image embedding using the [[File:Image.jpg]] syntax. This is a known bug related to a change that made URL protocol matching case-insensitive. As a workaround, use "file://" instead of "file:" as shown below.

Modification (MW 1.6+)

MediaWiki version:

≥ 1.6

To allow links to local files (which may make sense in an intranet context), put this into your LocalSettings.php:

$wgUrlProtocols[] = "file://";

Usually you only want to add protocols to this array. The default protocols should all be safe to click on (no evil side effects), and removing a protocol from the list will cause URLs using those protocols to become unrecognized in many places throughout the software. In particular, removing 'http://' or other common protocols will probably break huge amounts of stuff. Nevertheless, if you need to do so (for example, you already have a News: namespace), you can do something like this:

$wgUrlProtocols = array_diff($wgUrlProtocols, array('news:'));

The default value has changed in MediaWiki 1.6.0, before that version the following were not recognized by default:

• telnet://
• nntp://
• worldwind://

The default value in MediaWiki 1.22.0 is

$wgUrlProtocols = array(
	'http://',
	'https://',
	'ftp://',
	'ftps://', // If we allow ftp:// we should allow the secure version.
	'ssh://',
	'sftp://', // SFTP > FTP
	'irc://',
	'ircs://', // @bug 28503
	'xmpp:', // Another open communication protocol
	'sip:',
	'sips:',
	'gopher://',
	'telnet://', // Well if we're going to support the above.. -ævar
	'nntp://', // @bug 3808 RFC 1738
	'worldwind://',
	'mailto:',
	'tel:', // If we can make emails linkable, why not phone numbers?
	'sms:', // Likewise this is standardized too
	'news:',
	'svn://',
	'git://',
	'mms://',
	'bitcoin:', // Even registerProtocolHandler whitelists this along with mailto:
	'magnet:', // No reason to reject torrents over magnet: when they're allowed over http://
	'urn:', // Allow URNs to be used in Microdata/RDFa <link ... href="urn:...">s
	'geo:', // urls define geo locations, they're useful in Microdata/RDFa and for coordinates
	'//', // for protocol-relative URLs
);

Modification (MW 1.5)

MediaWiki version:

1.5

In earlier versions the setting was a regexp expression which matched the beginning part of the URI; in other words, it is a set of prefixes separated by '|' (with '/' converted to '\/' because '/' has a special meaning in a regular expression.

$wgUrlProtocols = 'http:\/\/|https:\/\/|ftp:\/\/|irc:\/\/|gopher:\/\/|news:|mailto:';

This default value causes MediaWiki to render URIs with the following prefixes as external links:

• http://
• https://
• ftp://
• irc://
• gopher://
• news:
• mailto:

Older versions

If you need this functionality in older versions, there is the function replaceExternalLinks in ./includes/Parser.php. Just add a line for your protocol there.

See also

• MetaWiki:URI schemes
• UNC links