Extension:DateDiff

MediaWiki extensions manual

DateDiff Release status: stable
Implementation	Parser function
Description	Takes two dates and returns all intermediary days
Author(s)	Kwisatz, Jeroen De Dauw
Latest version	0.4.0 (2021-11-11)
MediaWiki	1.25+
PHP	7.2+
Database changes	No
License	Creative Commons Attribution Share Alike 3.0
Download	Download extension Git [?]: Browse repository (GitHub) Gerrit code review Git commit log Download source tarball README CHANGELOG
Example	sandbox.semantic-mediawiki.org
Hooks used ParserFirstCallInit
Translate the DateDiff extension if it is available at translatewiki.net

The DateDiff extension adds the #dates parser function that returns a list of intermediary days.

Usage

The #dates parser function comes with two parameters |StartDate and |EndDate which is used as follows:

Syntax

{{#dates:
 |StartDate=2016/10/01
 |EndDate=2016/10/02
}}

Result

2016-10-01T00:00:00+02:00,2016-10-02T00:00:00+02:00

Examples

A typical use case is events in a semantic setup that span multiple days. To have the events appear on all days on a calendar provided by the Semantic Result Formats extension, you would use something like (requires the ParserFunctions extension):

{{#ifeq: {{{recurring}}}
 |no
 |{{#set: Has date={{#dates: |StartDate={{{from}}} |EndDate={{{till}}} }} |+sep=, }}
}}

Number of days between two days (requires the Arrays extension):

{{#arraydefine:days
 |{{#dates: |StartDate=2015-04-01 |EndDate=2015-04-10 }}
}}
{{#arraysize:days}}

Installation

• Download and move the extracted DateDiff folder to your extensions/ directory.
  Developers and code contributors should install the extension from Git instead, using:

  cd extensions/
  git clone https://gerrit.wikimedia.org/r/mediawiki/extensions/DateDiff
  

• Add the following code at the bottom of your LocalSettings.php file:

  wfLoadExtension( 'DateDiff' );
  

• Done – Navigate to Special:Version on your wiki to verify that the extension is successfully installed.

To users running MediaWiki 1.39 or earlier:

The instructions above describe the new way of installing this extension using wfLoadExtension(). If you need to install this extension on these earlier versions (MediaWiki 1.39 and earlier), instead of wfLoadExtension( 'DateDiff' );, you need to use:

require_once "$IP/extensions/DateDiff/DateDiff.php";