public function signingToken($url) {
        if (isset($this->config['signing_key'])
            && ($key = $this->config['signing_key'])) {
            return md5($key.basename($url));
        }
    }
public function signingToken($url) {
        if (isset($this->config['signing_key'])
            && ($key = $this->config['signing_key'])) {
            return md5($key.basename($url));
        }
    }
public function signingToken ( $ url ) { if ( isset ( $ this -> config [ 'signing_key' ] ) && ( $ key = $ this -> config [ 'signing_key' ] ) ) { return md5 ( $ key . basename ( $ url ) ) ; } }
Generate the signing token from a URL or path.  Or, if no key was defined,
return nothing.

@param string path or url
@return string|void
Generate the signing token from a URL or path . Or if no key was defined return nothing .