Elgg-Lorea-Hydra/actions/admin/plugins/activate_all.php

<?php
/**
 * Activates all specified installed and inactive plugins.
 *
 * All specified plugins in the mod/ directory that aren't active are activated and the views
 * cache and simplecache are invalidated.
 *
 * @package Elgg.Core
 * @subpackage Administration.Plugins
 */

$guids = get_input('guids');
$guids = explode(',', $guids);

$plugins = array();
foreach ($guids as $guid) {
	$plugin = get_entity($guid);
	if (!$plugin->isActive()) {
		$plugins[$plugin->getId()] = $plugin;
	}
}

do {
	$additional_plugins_activated = false;
	foreach ($plugins as $key => $plugin) {
		if ($plugin->activate()) {

			$ids = array(
				'cannot_start' . $plugin->getID(),
				'invalid_and_deactivated_' . $plugin->getID()
			);

			foreach ($ids as $id) {
				elgg_delete_admin_notice($id);
			}

			$additional_plugins_activated = true;
			unset($plugins[$key]);
		}
	}
	if (!$additional_plugins_activated) {
		// no updates in this pass, break the loop
		break;
	}
} while (count($plugins) > 0);

if (count($plugins) > 0) {
	foreach ($plugins as $key => $plugin) {
		$msg = $plugin->getError();
		$string = ($msg) ? 'admin:plugins:activate:no_with_msg' : 'admin:plugins:activate:no';
		register_error(elgg_echo($string, array($plugin->getFriendlyName(), $plugin->getError())));
	}
}

// don't regenerate the simplecache because the plugin won't be
// loaded until next run.  Just invalidate and let it regnerate as needed
elgg_flush_caches();

forward(REFERER);