MultiplePages mediawiki extension

multi.php

$wgHooks['MediaWikiPerformAction'][] = 'wfActionMultipleArticles';

function wfActionMultipleArticles($output, $article, $title, $user, $request, $wiki) {
  $action = $request->getText('action', 'view');

  if ($action != 'multi') {
    return true;
  }


  $pages_raw = $request->getText('pages');
  $pages = explode('|', $pages_raw);

  foreach ($pages as $page) {
    $title = Title::newFromText($page);
    $wikipage = WikiPage::factory($title);
    if ($wikipage->exists()) {
      $output->addWikiText("= $title =\n");
      $output->addWikiText($wikipage->getText());
      $output->addWikiText("<br/><br/>");
    }
  }

  $page_title = $request->getText('title', 'Multiple Pages View');
  $output->setPageTitle($page_title);

  return false;
}