What are the key steps involved in making API requests to PayPal for payment processing in PHP?

When making API requests to PayPal for payment processing in PHP, the key steps involve setting up API credentials, constructing the request payload, sending the request to PayPal's API endpoint, and handling the response accordingly. 

// Set up API credentials
$api_username = 'YOUR_API_USERNAME';
$api_password = 'YOUR_API_PASSWORD';
$api_signature = 'YOUR_API_SIGNATURE';

// Construct the request payload
$data = array(
    'USER' => $api_username,
    'PWD' => $api_password,
    'SIGNATURE' => $api_signature,
    // Add other required parameters here
);

// Send the request to PayPal's API endpoint
$ch = curl_init('https://api-3t.sandbox.paypal.com/nvp');
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($data));
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$response = curl_exec($ch);
curl_close($ch);

// Handle the response accordingly
if(!$response){
    // Handle error
} else {
    // Process the response data
}

Keywords

PayPal API payment processing PHP cURL error handling

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