"1012",
        "VK_VERSION"     => "008",
        "VK_SND_ID"      => "uid100049",
        "VK_STAMP"       => "67273",
        "VK_AMOUNT"      => "8.7",
        "VK_CURR"        => "EUR",
        "VK_REF"         => "672739",
        "VK_MSG"         => "aPangalink: 67273",
        "VK_RETURN"      => "https://romet.vm-backend.dev.elkdata.ee/payment/callback/order/bank",
        "VK_CANCEL"      => "https://romet.vm-backend.dev.elkdata.ee/payment/callback/order/bank",
        "VK_DATETIME"    => "2022-08-11T16:11:45+0300",
        "VK_LANG"        => "EST",
        "VK_ACC"         => "EE171010123456789017",
        "VK_NAME"        => "Veebimajutus",
        "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! LHV 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) . $fields["VK_SND_ID"] .     /* uid100049 */
        str_pad (mb_strlen($fields["VK_STAMP"], "UTF-8"),   3, "0", STR_PAD_LEFT) . $fields["VK_STAMP"] .      /* 67273 */
        str_pad (mb_strlen($fields["VK_AMOUNT"], "UTF-8"),  3, "0", STR_PAD_LEFT) . $fields["VK_AMOUNT"] .     /* 8.7 */
        str_pad (mb_strlen($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) . $fields["VK_REF"] .        /* 672739 */
        str_pad (mb_strlen($fields["VK_MSG"], "UTF-8"),     3, "0", STR_PAD_LEFT) . $fields["VK_MSG"] .        /* aPangalink: 67273 */
        str_pad (mb_strlen($fields["VK_RETURN"], "UTF-8"),  3, "0", STR_PAD_LEFT) . $fields["VK_RETURN"] .     /* https://romet.vm-backend.dev.elkdata.ee/payment/callback/order/bank */
        str_pad (mb_strlen($fields["VK_CANCEL"], "UTF-8"),  3, "0", STR_PAD_LEFT) . $fields["VK_CANCEL"] .     /* https://romet.vm-backend.dev.elkdata.ee/payment/callback/order/bank */
        str_pad (mb_strlen($fields["VK_DATETIME"], "UTF-8"), 3, "0", STR_PAD_LEFT) . $fields["VK_DATETIME"];    /* 2022-08-11T16:11:45+0300 */
/* $data = "0041012003008009uid100049005672730038.7003EUR006672739017aPangalink: 67273067https://romet.vm-backend.dev.elkdata.ee/payment/callback/order/bank067https://romet.vm-backend.dev.elkdata.ee/payment/callback/order/bank0242022-08-11T16:11:45+0300"; */
// STEP 4. Sign the data with RSA-SHA1 to generate MAC code
// ========================================================
openssl_sign ($data, $signature, $private_key, OPENSSL_ALGO_SHA1);
/* Itz+7ck/7+y5XyqPJHT6+JJKUrB3dyLueI/rk2EXYTx4zdBTTCnToAXhbSl8R/FALbfjgE4fy6uCbgF+yrkSEMXKyadQA4b5SJPQpA+QIiJHYMuxDt/UTaN4zKN/Wet5MplYggcWmaELd6oeAtDUiL0eswUBmh0MrPLUlMNgrZJ+ULWqsl1kDuZgcW1LsvHsQbZbOf2Dm1T6pwRGp0nwZi3hzcyhxV10zelogIHqCyhlnSEr5J5n5MlxV5uc/SRli/Zr2VfHBjj5GoNtPvTT6QGrhd0gLFyP9xI8vqS5svDKW1AganZqmK21D1WcNd6lEkmqGZhM+OVBExqH/Ojc9Q== */
$fields["VK_MAC"] = base64_encode($signature);
// STEP 5. Generate POST form with payment data that will be sent to the bank
// ==========================================================================
?>
        
        Makse teostamise näidisrakendus "LHV"