_paypal.express.php

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<?php

    // namespace
        namespace Sample;

    // inclusione del framework
        require '../../../../_src/_config.php';

        use PayPalCheckoutSdk\Core\PayPalHttpClient;
        use PayPalCheckoutSdk\Core\SandboxEnvironment;

        ini_set('error_reporting', E_ALL);
        ini_set('display_errors', '1');
        ini_set('display_startup_errors', '1');

#       $h = fopen( 'order.log', 'w+' );
#       fwrite( $h, '=== INIZIO LOG ORDINE ===' . PHP_EOL );
#       fwrite( $h, file_get_contents('php://input') . PHP_EOL );
#       fwrite( $h, print_r( json_decode( file_get_contents('php://input'), true ), true ) );

        $dati = json_decode( file_get_contents('php://input'), true );
        if( is_array( $dati ) ) { $_REQUEST = array_replace_recursive( $_REQUEST, $dati ); }

    // riordino della $_REQUEST
        rksort( $_REQUEST );

    // provider (a beneficio delle controller)
        $provider = 'paypal';

    // identificativo del carrello
        if( isset( $_REQUEST['orderID'] ) ) {
            $id                 = $_REQUEST['orderID'];
        } else {
            $id                 = 0;
        }

    // nome del file di ricevuta
        $fileRicevuta = 'var/log/payments/paypal/paypal.' . sprintf( '%08d', $id ) . '.' . time() . '.log';

    // registro la comunicazione
        appendToFile( print_r( $_REQUEST, true ), $fileRicevuta );

#       fwrite( $h, print_r( $_REQUEST, true ) );

        class PayPalClient {

            public static function client() {
                return new PayPalHttpClient(self::environment());
            }

            public static function environment() {

                global $cf;
                $clientId = getenv("CLIENT_ID") ?: $cf['ecommerce']['provider']['paypal']['profile']['client'];
                $clientSecret = getenv("CLIENT_SECRET") ?: $cf['ecommerce']['provider']['paypal']['profile']['secret'];
                if( $cf['site']['status'] === PRODUCTION ) {
                    return new lIVEEnvironment($clientId, $clientSecret);
                } else {
                    return new SandboxEnvironment($clientId, $clientSecret);
                }

            }

        }

        use Sample\PayPalClient;
        use PayPalCheckoutSdk\Orders\OrdersGetRequest;

        class GetOrder {

            public static function getOrder($orderId) {

                global $fileRicevuta;

                $client = PayPalClient::client();
                $response = $client->execute(new OrdersGetRequest($orderId));

#               print json_encode($response->result);

                print "Status Code: {$response->statusCode}\n";
                print "Status: {$response->result->status}\n";
                print "Order ID: {$response->result->id}\n";
                print "Intent: {$response->result->intent}\n";
                print "Links:\n";

                foreach($response->result->links as $link) {
                    print "\t{$link->rel}: {$link->href}\tCall Type: {$link->method}\n";
                }

                // TODO Save the transaction in your database. Implement logic to save transaction to your database for future reference.
#               print "Gross Amount: {$response->result->purchase_units[0]->amount->currency_code} {$response->result->purchase_units[0]->amount->value}\n";

#               echo json_encode($response->result, JSON_PRETTY_PRINT);

#               fwrite( $h, print_r( (array) $response, true ) );
                appendToFile( print_r( json_decode( json_encode( $response ), true ), true ), $fileRicevuta );

            }

        }

        if (!count(debug_backtrace())) {
            GetOrder::getOrder( $_REQUEST['orderID'], true);
        }

?>