Extension:DollarSign

MediaWiki extensions manual - list

DollarSign Release status: stable
Implementation	Tag
Description	Recognize the LaTeX-style inline math mode with dollar signs. To print the dollar sign, type the dollar sign preceded by one backslash.
Author(s)	Sori Lee (SoriTalk)
Last version	1.0 (October 18th 2008)
MediaWiki	1.5 or newer
License	GPL
Download	(Code available in the article.)
Hooks used ParserBeforeStrip
Check usage (experimental)

How to install

Installing the extension

Make the file 'DollarSign.php' containing the following code, and place it in the 'extensions' directory.

<?php
/**
 * @author Sori Lee <sori24 (at) gmail (dot) com>
 * @license http://www.gnu.org/copyleft/gpl.html GNU General Public License 2.0 or later
 */
 
if(!defined('MEDIAWIKI'))
    die("This is an extension to the MediaWiki package and cannot be run standalone.");
 
// Register as an extention
$wgExtensionCredits['parserhook'][] = array(
        'name' => 'DollarSign',
        'version' => '1.0',
        'url' => 'http://www.mediawiki.org/wiki/Extension:DollarSign',
        'author' => 'Sori Lee',
        'description' => 'Recognize the LaTeX-style inline math mode with dollar signs. To print the dollar sign, type the dollar sign preceded by one backslash.',
);
 
// Register hooks
$wgHooks['ParserBeforeStrip'][] = 'dsParse';
 
// Parse function
function dsParse( &$parser, &$text, &$stripState ) {
        // We replace '$...$' by '<math>...</math>' and '\$' by '$'.
        $pattern = array('/([^\\\\]|^)\$([^\$]*)\$/', '/\\\\\$/');
        $replace = array('$1<math>$2</math>', '\$');
 
        // Perform the substitution.
        $text = preg_replace($pattern, $replace, $text);
 
        return true;
}

Loading the extension

At the end of LocalSettings.php, add the following.

require_once("$IP/extensions/DollarSign.php");