要在PHP中实现在线支付，通常需要以下步骤：
以下是一个使用PayPal支付的示例代码：
setConfig([
'mode' => 'sandbox',
'log.LogEnabled' => true,
'log.FileName' => 'PayPal.log',
'log.LogLevel' => 'DEBUG',
'cache.enabled' => true,
]);
$amount = new Amount();
$amount->setCurrency('USD')
->setTotal('10.00');
$transaction = new Transaction();
$transaction->setAmount($amount)
->setDescription('Payment description');
$redirectUrls = new RedirectUrls();
$redirectUrls->setReturnUrl('https://example.com/execute-payment')
->setCancelUrl('https://example.com/cancel-payment');
$payment = new Payment();
$payment->setIntent('sale')
->setPayer(new Payer(['payment_method' => 'paypal']))
->setRedirectUrls($redirectUrls)
->setTransactions([$transaction]);
try {
$payment->create($apiContext);
header('Location: ' . $payment->getApprovalLink());
} catch (Exception $e) {
echo $e->getMessage();
}
?>
要在PHP中实现数字货币交易，需要以下步骤：
以下是一个使用Coinbase交易的示例代码：
'The Sovereign Individual',
'description' => 'Mastering the Transition to the Information Age',
'local_price' => [
'amount' => '100.00',
'currency' => 'USD',
],
'pricing_type' => 'fixed_price',
'metadata' => [
'customer_id' => '123456',
],
];
$charge = Charge::create($chargeData);
header('Location: ' . $charge->hosted_url);
?>