Add text to the Special:UserLogin Page

Create a new directory for your Special page

mkdir /var/www/dekiwiki/deki/plugins/special_page/special_userlogin_custom

C:\Program Files\MindTouch\MindTouch\deki\plugins\special_page

Add the files

Once you have created the directory then create a file named: special_userlogin_custom.php and place it in the special_userlogin_custom directory.  Create the file with the following information:

<?php
if (defined('MINDTOUCH_DEKI')) :
DekiPlugin::registerHook(Hooks::SPECIAL_USER_LOGIN, 'wfSpecialUserLoginCustom', 10);

function wfSpecialUserLoginCustom($pageName, &$pageTitle, &$html, &$subhtml)
{
	$html = '<p style="float:right">Content is BEFORE the default registration info<br /> Here is the 2nd line of text</p>' . $html;
}

endif;

Edit your LocalSettings.php file and add the following line:

$wgDekiSpecialPages[] = 'special_userlogin_custom';

 Then visit http://yourwiki/Special:UserLogin

You will then be able to see the content that is referenced as $html above.  You can edit the content and refresh the page to see the formatting.  To keep this example simple I used inline styles, but you are more than welcome to reference a css file as explained in the documentation. Note that the text will not wrap by default, so you will need to inject line breaks or format it accordingly with CSS.