OpenCart
Empower your OpenCart online store with the PayLater OpenCart Plugin, a cutting-edge solution designed to enhance the purchasing journey for both merchants and customers. This seamlessly integrated plugin opens up a world of possibilities, allowing merchants to offer a convenient and flexible PayLater option at checkout.
Download plugin
Always install the latest version. Older releases are deprecated — see the release notes for the full version history.
The PayLater plugin needs PHP 8.2 or newer. Keep PHP up to date with the latest security release for your version.
Installation
Paylater empowers merchants to offer the popular Buy Now, Pay Later (BNPL) payment option to their customers on their OpenCart websites. This document guides you through the installation and setup process of the PayLater plugin.
Before you begin
Ensure you have an OpenCart store installed and running.
Compatibility
| Component | Supported |
|---|---|
| OpenCart | OpenCart 4.0.x (tested on 4.0.2.3). OpenCart 3.x is not supported. |
| PHP | 8.2 or newer (tested on 8.3) |
| Store currency | QAR. A new OpenCart store has no QAR currency: add it under System → Localisation → Currencies and make it the default. PayLater and its widgets are shown only when the store's default currency and the shopper's chosen currency are both QAR, and the settings page warns you if the default is something else. |
Frontend Widgets:
PLP Product List Page
PDP Product Detail Page
Install the extension
Install the extension from the OpenCart admin with the Extension Installer.
If an older PayLater version is installed, first uninstall PayLater under Extensions →
Extensions → Payments, then uninstall and delete it in Extensions → Installer.
Otherwise the upload is refused with Extension already installed!. Note your Client ID,
Client Secret and Outlet ID before you uninstall.
Version 3.0 was packaged one folder too deep and was rejected with
Warning: Could not find install.json!. If you tried it, delete
system/storage/marketplace/paylater.ocmod.zip on your server before you upload the current
version. Otherwise the installer answers File already exist!, and the failed file does not
appear in the admin, so you cannot delete it there.
- Navigate to Extensions → Installer, click Upload and choose the PayLater zip, then click Install next to PayLater in the list.
Configurations
- Once installed, navigate to Extensions → Extensions and choose Payments from the type filter.
- Locate PayLater in the list, click Install (the green + button), then Edit.
- Fill in the PayLater settings:
| Setting | What to enter |
|---|---|
| Status | Turns the PayLater payment method on or off. |
| Mode | UAT with the test credentials, or Production with your live credentials. |
| Client ID / Client Secret | Your OAuth credentials from PayLater. |
| Outlet ID | Your outlet ID from PayLater. |
| UAT Base URL / Production Base URL | Pre-filled with https://connect.uat.paylaterapp.com/ and https://connect.paylaterapp.com/. Leave them as they are unless PayLater tells you otherwise: your Client Secret is sent to these addresses. |
| Payment Method Title | The payment method name shown at checkout. |
| Sort Order | Position of PayLater in the list of payment methods. |
| Webhook URL | Shown read-only. Send it to the PayLater team so they can register it. |
| Webhook Secret | Provided by PayLater after they register your webhook URL. |
| Widget settings | Turn the widget on or off for the product listing and product detail pages, and set its minimum amount (QAR), title and footer text. |
- Click Save Changes to complete the configuration
Testing
To ensure smooth functionality, it's recommended to test the PayLater payment option:
- Add a product to your cart and proceed to checkout
- During checkout, select PayLater as the payment method.
- You will be redirected to the secure PayLater platform to complete the BNPL payment process.
- Use a test shopper account from the Test environment.
- Please use 300 QAR as the amount to test
Get your Client ID, Client Secret, and Outlet ID from your PayLater
account dashboard. For your Webhook Secret, share your webhook endpoint with the PayLater team.
For sandbox values and test shoppers, see the Test environment.
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