how to insert a search form in custom content

I'm trying to insert a search form in the middle of some custom HTML on a Panel Page. There's already the Search Block on the page somewhere else. The Search Widget is available, but it gets inserted after the custom HTML, which is not what I want. I thought I could do something like
http://api.drupal.org/api/drupal/modules!search!search-block-form.tpl.php/7

<div class="container-inline"> <?php if (empty($variables['form']['#block']->subject)): ?> <h2 class="element-invisible"><?php print t('Search form'); ?></h2> <?php endif; ?> <?php print $search_form; ?> </div> 

or

<?php drupal_get_form('search_form'); ?> 

but the PHP doesn't seem to execute (naturally, I have PHP selected as the input.).

Edit: This produced a search form in the correct place, but the CSS conflicts with the existing Search Block.

<?php print render(drupal_get_form('search_block_form')); ?>