Joomla 3 Plugin to disable Bootstrap

gistfile1.txt

<?php

defined('_JEXEC') or die;

class  plgSystemDisable_bootstrap extends JPlugin {

  function onBeforeCompileHead() {

        $app = JFactory::getApplication();
		if (!$app->isAdmin()) {
			$on = $this->params->get('disabled', 0);
			if ($on) {
                $doc = JFactory::getDocument();

				if(!method_exists($doc,'getHeadData'))
				{
					return;
				}

				$headers = $doc->getHeadData();

				$scripts = isset($headers['scripts']) ? $headers['scripts'] : array();
				$headers['scripts'] = array();
				foreach($scripts as $url=>$type)
				{
					if (strpos($url, 'bootstrap') === false)
					{
						$headers['scripts'][$url] = $type;
					}
				}

				$doc->setHeadData($headers);

			}
		}
	}
}