"1012",
        "VK_VERSION"     => "008",
        "VK_SND_ID"      => "uid100036",
        "VK_STAMP"       => "96",
        "VK_AMOUNT"      => "15.00",
        "VK_CURR"        => "EUR",
        "VK_REF"         => "961",
        "VK_MSG"         => "Vaheajatellimus 2102280044 02.03.2021 13:00",
        "VK_RETURN"      => "http://127.0.0.1:8000/en/orders/banks/thorbanks_response/",
        "VK_CANCEL"      => "http://127.0.0.1:8000/en/orders/banks/thorbanks_response/",
        "VK_DATETIME"    => "2021-02-28T12:34:17+0000",
        "VK_LANG"        => "EST",
        "VK_ENCODING"    => "UTF-8"
);
// STEP 3. Generate data to be signed
// ==================================
// Data to be signed is in the form of XXXYYYYY where XXX is 3 char
// zero padded length of the value and YYY the value itself
// NB! SEB expects symbol count, not byte count with UTF-8,
// so use `mb_strlen` instead of `strlen` to detect the length of a string
$data = str_pad (mb_strlen($fields["VK_SERVICE"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_SERVICE"] .    /* 1012 */
        str_pad (mb_strlen($fields["VK_VERSION"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_VERSION"] .    /* 008 */
        str_pad (mb_strlen($fields["VK_SND_ID"], "UTF-8"),  3, "0", STR_PAD_LEFT) . $fields["VK_SND_ID"] .     /* uid100036 */
        str_pad (mb_strlen($fields["VK_STAMP"], "UTF-8"),   3, "0", STR_PAD_LEFT) . $fields["VK_STAMP"] .      /* 96 */
        str_pad (mb_strlen($fields["VK_AMOUNT"], "UTF-8"),  3, "0", STR_PAD_LEFT) . $fields["VK_AMOUNT"] .     /* 15.00 */
        str_pad (mb_strlen($fields["VK_CURR"], "UTF-8"),    3, "0", STR_PAD_LEFT) . $fields["VK_CURR"] .       /* EUR */
        str_pad (mb_strlen($fields["VK_REF"], "UTF-8"),     3, "0", STR_PAD_LEFT) . $fields["VK_REF"] .        /* 961 */
        str_pad (mb_strlen($fields["VK_MSG"], "UTF-8"),     3, "0", STR_PAD_LEFT) . $fields["VK_MSG"] .        /* Vaheajatellimus 2102280044 02.03.2021 13:00 */
        str_pad (mb_strlen($fields["VK_RETURN"], "UTF-8"),  3, "0", STR_PAD_LEFT) . $fields["VK_RETURN"] .     /* http://127.0.0.1:8000/en/orders/banks/thorbanks_response/ */
        str_pad (mb_strlen($fields["VK_CANCEL"], "UTF-8"),  3, "0", STR_PAD_LEFT) . $fields["VK_CANCEL"] .     /* http://127.0.0.1:8000/en/orders/banks/thorbanks_response/ */
        str_pad (mb_strlen($fields["VK_DATETIME"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_DATETIME"];    /* 2021-02-28T12:34:17+0000 */
/* $data = "0041012003008009uid1000360029600515.00003EUR003961043Vaheajatellimus 2102280044 02.03.2021 13:00057http://127.0.0.1:8000/en/orders/banks/thorbanks_response/057http://127.0.0.1:8000/en/orders/banks/thorbanks_response/0242021-02-28T12:34:17+0000"; */
// STEP 4. Sign the data with RSA-SHA1 to generate MAC code
// ========================================================
openssl_sign ($data, $signature, $private_key, OPENSSL_ALGO_SHA1);
/* rhcx4998pwjdQQtFGtkOf0uG2Nhyeuc0bDiKfk10BmLjFiqmlNa2OzS0LEW6+g4KDFiMMTIH53z0Jd8Q4xzaggVjivHsfSu0BQBWrYzeAVKuMRwXMlmJlt18vDRutL+KhE7ihjfS7E6P42uazsqNWpF0gHZbt2QMQlLAmta08BiLIWDNCR5sWjV2STXrnaKFCdiz7v2Us01ZdjGuAM1GECIucJmw0ExZQ/jG6zvRjFwuJ8zZMXqTP0Fnovz3iwxl0z2DCn3GgZG3sjSbXH/xdT5DteWwgb4k2k7dsf705i/BHn4SBNj38+RLqia9hH3GyDy+d2Zbfjl9bSFMKoPSHg== */
$fields["VK_MAC"] = base64_encode($signature);
// STEP 5. Generate POST form with payment data that will be sent to the bank
// ==========================================================================
?>
        
        Makse teostamise näidisrakendus "SEB"