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<?php
namespace Studip\Cache;
/**
* Trait for unique cache hashes per key for each system based on db configuration which should
* be sufficient to eliminate cache mishaps.
*
* @author Jan-Hendrik Willms <tleilax+studip@gmail.com>
* @license GPL2 or any later version
* @package studip
* @subpackage cache
* @since Stud.IP 5.0
*/
trait KeyTrait
{
protected ?string $cache_prefix = null;
/**
* Returns a prefix cache key based on db configuration.
*
* @param string $offset
* @return string
*/
protected function getCacheKey(string $offset): string
{
if ($this->cache_prefix === null) {
$this->cache_prefix = md5("{$GLOBALS['DB_STUDIP_HOST']}|{$GLOBALS['DB_STUDIP_DATABASE']}");
}
return "$this->cache_prefix/$offset";
}
}
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