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Step 4: Display the payment form

Objective

  • Display all payment fields (card number, expiration date, CVV, etc.) on your website.

I. Initalize the payment form

In the HEAD,,

  1. Loadour JavaScript libraryin a tag called<script>.

It is imperative for the main library to be loaded very early on, well before the other JS libraries used on your page.

src="https://static.lyra.com/static/js/krypton-client/V4.0/stable/kr-payment-form.min.js"
  1. Implement the public key.

Set the public key in the parameter kr-public-key

<head>
(...)
<script type="text/javascript"
        src="https://static.lyra.com/static/js/krypton-client/V4.0/stable/kr-payment-form.min.js"
        kr-public-key="69876357:testpublickey_DEMOPUBLICKEY95me92597fd28tGD4r5"
        (...)
>
 </script>
(...)
 </head>

As a reminder, it corresponds to the 3 rd key of the table.

3. Add other initialization parameters
  • Add 2 initialization parameters , for example:
name Description
kr-post-url-success URL to which the buyer's browser is redirected in case of a successful payment. ( recommended )
kr-language Defines the language in which the form will be displayed. Accepts ISO 639-1 (en or en-US). If the parameter is not defined, the form uses the language of the browser.

. Code sample:

<head>
(...)
<script type="text/javascript"
        src="https://static.lyra.com/static/js/krypton-client/V4.0/stable/kr-payment-form.min.js"
        kr-public-key="69876357:testpublickey_DEMOPUBLICKEY95me92597fd28tGD4r5"
        kr-post-url-success="paid.php"
        kr-language="en-EN">
 </script>
(...)
 </head>

Référez-vous à ces 2 rubriques Paramètres généraux et Paramètres de personnalisation des "placeholders" pour les autres paramètres. Après la balise <script>, choisissez un thème.

4. Choose a theme

Neon is the new default theme. Here are the links to load this theme.

<head>
(...)
<link rel="stylesheet" href="https://static.lyra.com/static/js/krypton-client/V4.0/ext/neon-reset.min.css">
  <script
  src="https://static.lyra.com/static/js/krypton-client/V4.0/ext/neon.js">
 </script>
 (...)
 </head>

More info: themes.

5. Adding JS functions (optional)

  • In another <script> tag, you can integrate events or JS methods.

  • For more details, Event presentation and Method presentation.

Example of code for the HEAD without JS function

<head>
<!-- STEP :
1 : load the JS librairy 
2 : required public key 
3 : the JS parameters url sucess and langage EN  -->

<script type="text/javascript"
        src="https://static.lyra.com/static/js/krypton-client/V4.0/stable/kr-payment-form.min.js"
        kr-public-key="69876357:testpublickey_DEMOPUBLICKEY95me92597fd28tGD4r5"
        kr-post-url-success="paid.php"
        kr-language="en-EN">
 </script>

  <!--  theme NEON should be loaded in the HEAD section   -->
<link rel="stylesheet" href="https://static.lyra.com/static/js/krypton-client/V4.0/ext/neon-reset.min.css">
<script src="https://static.lyra.com/static/js/krypton-client/V4.0/ext/neon.js">
 </script>
 </head>

II. Define the display mode

Dans le BODY, choisissez le mode d'affichage et valorisez le paramètre kr-form-token avec le formToken généré (Etape 3 : Créer un formToken).

Mode Description
list Displays a list of available and compatible payment methods Default display.
pop-in Displays a payment button that opens a pop-in containing available and compatible payment methods.
list with embedded card Displays the embedded fields for card payment and the available and compatible payment methods.
List mode (default) Pop-in mode List mode with embedded card
 
<body>
        <div class="kr-smart-form" kr-form-token="[GENERATED FORMTOKEN]"></div>
        (...)
</body>
 
<body>
        <div class="kr-smart-form" kr-popin kr-form-token="[GENERATED FORMTOKEN]"></div>
        (...)
</body>
 
<body>
        <div class="kr-smart-form" kr-card-form-expanded kr-form-token="[GENERATED FORMTOKEN]"></div>
        (...)
</body>
More info: List mode More info: Pop-in mode More info: List mode with embedded card

You also have the choice :

  • Highlight a payment method ;
  • Highlight multiple payment methods ;

III. Advanced customization

This step is optional.

Example of customization :

  • Hide card payment logos
  • Change the display order
  • Personalization of payment buttons.
  • Personalize the page layout

IV. Simplified example in PHP

In the sample folder, the file for this step is smartForm.php.

For more details, Example file: smartForm.php

NEXT STEP N°5

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