protected function buildSignatureKey()
    {
        $signatures = [
            'a' => $this->appId,
            'b' => $this->bucket,
            'k' => $this->secretId,
            'e' => time() + 2592000,
            't' => time(),
            'r' => rand(),
            'u' => '0',
            'f' => ''
        ];

        return http_build_query($signatures);
    }
protected function buildSignatureKey()
    {
        $signatures = [
            'a' => $this->appId,
            'b' => $this->bucket,
            'k' => $this->secretId,
            'e' => time() + 2592000,
            't' => time(),
            'r' => rand(),
            'u' => '0',
            'f' => ''
        ];

        return http_build_query($signatures);
    }
protected function buildSignatureKey ( ) { $ signatures = [ 'a' => $ this -> appId , 'b' => $ this -> bucket , 'k' => $ this -> secretId , 'e' => time ( ) + 2592000 , 't' => time ( ) , 'r' => rand ( ) , 'u' => '0' , 'f' => '' ] ; return http_build_query ( $ signatures ) ; }
Build signature Key

@return string
Build signature Key