php-omnipayHow can I use PHP Omnipay to process a billing transaction?

PHP Omnipay is a library for processing payment transactions. It supports a wide range of popular payment gateways and provides an easy way to integrate with them. To process a billing transaction with PHP Omnipay:

1. Install the library using Composer:

composer require omnipay/omnipay

2. Initialize the gateway object with your credentials:

$gateway = Omnipay::create('PayPal_Express');
$gateway->setUsername('your_username');
$gateway->setPassword('your_password');
$gateway->setSignature('your_signature');

3. Set the transaction parameters:

$params = [
    'amount' => 10.00,
    'currency' => 'USD',
    'returnUrl' => 'https://www.example.com/return',
    'cancelUrl' => 'https://www.example.com/cancel',
];

4. Send the transaction request:

$response = $gateway->purchase($params)->send();

5. Check the response:

if ($response->isSuccessful()) {
    // Payment was successful
} elseif ($response->isRedirect()) {
    // Redirect to offsite payment gateway
    $response->redirect();
} else {
    // Payment failed
    echo $response->getMessage();
}

6. Complete the transaction:

$purchaseResponse = $gateway->completePurchase($params)->send();

if ($purchaseResponse->isSuccessful()) {
    // Payment was successful
} else {
    // Payment failed
    echo $purchaseResponse->getMessage();
}

7. Finally, check the transaction status:

$statusResponse = $gateway->fetchTransaction($params)->send();

if ($statusResponse->isSuccessful()) {
    // Payment status is successful
} else {
    // Payment status failed
    echo $statusResponse->getMessage();
}

For more information, please refer to the PHP Omnipay documentation.

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