icingaweb2/modules/setup/application/views/scripts/form/setup-requirements.phtml

<?php

use Icinga\Web\Wizard;

?>
<h1>Icinga Web 2</h1>
<?= $form->getWizard()->getRequirements(true); ?>
<?php foreach ($form->getWizard()->getPage('setup_modules')->getModuleWizards() as $moduleName => $wizard): ?>
<h1><?= ucwords($moduleName) . ' ' . $this->translate('Module'); ?></h1>
<?= $wizard->getRequirements(); ?>
<?php endforeach ?>
<form id="<?= $form->getName(); ?>" name="<?= $form->getName(); ?>" enctype="<?= $form->getEncType(); ?>" method="<?= $form->getMethod(); ?>" action="<?= $form->getAction(); ?>">
  <?= $form->getElement($form->getTokenElementName()); ?>
  <?= $form->getElement($form->getUidElementName()); ?>
  <div class="buttons">
    <?= $form->getElement(Wizard::BTN_PREV); ?>
    <?php
      $btn = $form->getElement(Wizard::BTN_NEXT);
      if (! $form->getWizard()->getRequirements()->fulfilled()) {
          $btn->setAttrib('disabled', 1);
      }
      echo $btn;
    ?>
    <div class="requirements-refresh">
      <?php $title = $this->translate('You may also need to restart the web-server for the changes to take effect!'); ?>
      <?= $this->qlink(
        $this->translate('Refresh'),
        null,
        null,
        array(
          'class'       => 'button-like',
          'title'       => $title,
          'aria-label'  => sprintf($this->translate('Refresh the page; %s'), $title)
        )
      ); ?>
    </div>
  </div>
</form>