Gist.php

<?php
	// add this code to $ip/extentions/Gist/Gist.php
	// include this in your LocalSettings.php require_once( "$IP/extensions/Gist/Gist.php" );
	
	// Usage <gist>{id}</gist>
	
	$wgHooks['ParserFirstCallInit'][] = 'efGistParserInit';

	function efGistParserInit(&$parser) {
		$parser->setHook( 'gist', 'efGistRender' );
		return true;
	}

	function efGistRender($input, $args, $parser, $frame) {
		if ((int)$input > 0) {
			return '<script src="http://gist.github.com/'.(int)$input.'.js"></script>';
		}
		return 'Not valid id';
	}
?>