Capture Invoice Payment Gist

pay_invoice.php

// Make sure user has card on file.
if (empty($user['cclastfour'])) {
    $config['vars']['nocard'] = true;
    $config['vars']['error'] = 'You do not have any payment methods on file';
    return $config;
}

$payment = localAPI('capturepayment', ['invoiceid' => $invoice_id], 'admin');
if ($payment['result'] === 'success') {
    $config['vars']['payment']['success'] = sprintf('Payment succeeded');
} else {
    $config['vars']['payment']['error'] = sprintf('Payment failed: %s', $payment['message']);
}