SpecialPrivateData.php

<?php
/**
 * ...
 *
 * @file
 * @author Niklas Laxström
 * @copyright Copyright © 2011 Niklas Laxström
 * @license http://www.gnu.org/copyleft/gpl.html GNU General Public License 2.0 or later
 */

/**
 * ...
 *
 * @ingroup SpecialPage
 */
class SpecialPrivateData extends UnlistedSpecialPage {

	function __construct() {
		parent::__construct( 'PrivateData' );
		
	}

	public function execute( $parameters ) {
		$this->setHeaders();

		if ( $parameters === null ) {
			throw new PermissionsError();
		}

		$this->getOutput()->disable();

		$title = Title::newFromText( $parameters );
		if ( !$title || !$title->exists() ) {
			return;
		}

		global $wgNamespaceProtection;
		$namespace = $title->getNamespace();
		$user = $this->getUser();

		if ( !$title->userCan( 'edit' ) ) {
			return;
		}

		if ( isset( $wgNamespaceProtection[$namespace] ) ) {
			foreach ( $wgNamespaceProtection[$namespace] as $right ) {
				if ( !$user->isAllowed( $right ) ) {
					return;
				}
			}
		}
		
		ob_end_clean(); // Avoid warnings here

		$db = wfGetDB( DB_SLAVE );
		$table = 'privatedata';
		$fields = 'pd_text';
		$conds = array( 'pd_page' => $title->getArticleId() );
		$res = $db->selectRow( $table, $fields, $conds, __METHOD__ );
		if ( $res ) {
			$msg = wfMessage( 'termbank-privatedata-note' )->parse();
			$text = "<em>$msg</em><hr />";
			$text .= self::convertWhiteSpaceToHTML( $res -> pd_text );
						
			echo Html::rawElement( 'div', array( 'class' => 'ttp-privatedata' ), $text );
		}
		return;
	}
public static function convertWhiteSpaceToHTML( $msg ) {

$msg = htmlspecialchars( $msg );
$msg = preg_replace( '/^ /m', '&#160;', $msg );
$msg = preg_replace( '/ $/m', '&#160;', $msg );
$msg = preg_replace( '/ /',  '&#160; ', $msg );
$msg = str_replace( "\n", '<br />', $msg );

return $msg;

}
}