.env file

PAYHERE_MERCHENT_ID=24333554141
PAYHERE_SECRET=8xxxxxxxxxxxxxxxxxxxxxxxxxJ7J
PAYHERE_API_URL=https://sandbox.payhere.lk/pay/checkout

config/payhere.php

return [
    'api_url'       => env('PAYHERE_API_URL', 'https://sandbox.payhere.lk/pay/checkout'),
    'merchant_id'   => env('PAYHERE_MERCHENT_ID', 'no_merchent'),
    'secret'        => env('PAYHERE_SECRET', 'no_secrete'),
    'return_url'    => env('PAYHERE_RETURN_URL', config('app.url') . '/checkout/return'),
    'notify_url'    => env('PAYHERE_NOTIFY_URL', config('app.url') . '/checkout/notify'),
    'cancel_url'    => env('PAYHERE_CANCEL_URL', config('app.url') . '/checkout/cancel'),
];

Submit Order details (amount, items, name, etc)

<form class="width:100%" method="post" action="{{ config('payhere.api_url')}}">
@csrf
<input type="hidden" name="merchant_id" value="{{ config('payhere.merchant_id') }}">
<input type="hidden" name="return_url" value="{{ config('payhere.return_url') }}">
<input type="hidden" name="cancel_url" value="{{ config('payhere.cancel_url') }}">
<input type="hidden" name="notify_url" value="{{ config('payhere.notify_url') }}">
<input type="hidden" name="order_id" value="{{ $order->reference }}">
<input type="hidden" name="items" value="My Packages">
<input type="hidden" name="currency" value="{{ $order->currency }}">
<input type="hidden" name="amount" value="{{ $order->amount }}">
<input type="hidden" name="first_name" value="{{ $order->first_name }}">
<input type="hidden" name="last_name" value="{{ $order->last_name }}">
<input type="hidden" name="email" value="{{ $order->email }}">
<input type="hidden" name="phone" value="{{ $order->phone }}">
<input type="hidden" name="address" value="{{ $order->address }}">
<input type="hidden" name="city" value="{{ $order->city }}">
<input type="hidden" name="country" value="{{ $order->country }}">
<input type="hidden" name="hash" value="{{ $order->hash }}">

<input type="submit" class="" value="Pay Now">
</form>

thanks bro.

i think they don't provide sandbox for public, but we can create a process of intergration

we have to find the informations, i have a friend in sampath bank i'll try to get information from him.

@dev_lak can we create tutorials for srilankan payment gateway integration with php and node ??

https://support.payhere.lk/api-&-mobile-sdk/payhere-checkout