protected function getFilename($key)
    {
        $sha1 = sha1($key);
        $result = $this->path . '/' . substr($sha1, 0, 2) . '/' . substr($sha1, 2) . '.php';

        return $result;
    }
protected function getFilename($key)
    {
        $sha1 = sha1($key);
        $result = $this->path . '/' . substr($sha1, 0, 2) . '/' . substr($sha1, 2) . '.php';

        return $result;
    }
protected function getFilename ( $ key ) { $ sha1 = sha1 ( $ key ) ; $ result = $ this -> path . '/' . substr ( $ sha1 , 0 , 2 ) . '/' . substr ( $ sha1 , 2 ) . '.php' ; return $ result ; }
Get cache filename.

@param string $key Key
@return string Filename
Get cache filename .