easyappointments/src/application/helpers/asset_helper.php

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<?php defined('BASEPATH') OR exit('No direct script access allowed');
/* ----------------------------------------------------------------------------
* Easy!Appointments - Open Source Web Scheduler
*
* @package EasyAppointments
* @author A.Tselegidis <alextselegidis@gmail.com>
* @copyright Copyright (c) 2013 - 2017, Alex Tselegidis
* @license http://opensource.org/licenses/GPL-3.0 - GPLv3
* @link http://easyappointments.org
* @since v1.3.0
* ---------------------------------------------------------------------------- */
/**
* Assets URL helper function.
*
* This function will create an asset file URL that includes a cache busting parameter in order
* to invalidate the browser cache in case of an update.
*
* @param string $uri Relative URI (just like the one used in the base_url helper).
* @param string|null $protocol Valid URI protocol.
*
* @return string Returns the final asset URL.
*/
function asset_url($uri = '', $protocol = NULL) {
$ci =& get_instance();
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$cache_busting_token = !Config::DEBUG_MODE ? '?' . $ci->config->item('cache_busting_token') : '';
return base_url($uri . $cache_busting_token, $protocol);
}