PayPal-PHP-SDK | PHP SDK for PayPal RESTful APIs | REST library

The SDKs mentioned in that guide are deprecated, direct API calls are not deprecated, and are how it should be implemented.

It's all documented on the page you linked, there is this API reference: https://developer.paypal.com/docs/api/webhooks/v1/

The general-purpose PayPal-PHP-SDK deprecated. If you need an SDK for payments, use the Checkout-PHP-SDK (for the v2/checkout/orders API)

There is no supported SDK for Webhooks, integrate directly. Webhooks use a v1 URL, there is no v2 webhooks.

v1 endpoints in general are not deprecated, unless a newer version exists

v1/payments in particular is deprecated, because v2/payments and the functionality moved to v2/checkout/orders exist

Hard to guess at what precisely is wrong with the execute call without seeing the full API response body and headers, including a PayPal-Debug-ID

400 errors are usually a wrong credential problem, or credentials paired with the wrong environment, but that is less likely if your payment creation and oauth2 calls are working okay

The more important question is why are you using an deprecated V1 SDK, at all, which is no longer maintained? You should completely change your integration to the current V2 PHP SDK, documented here: https://developer.paypal.com/docs/api/rest-sdks/

The current best front-end experience to pair it with is https://developer.paypal.com/demo/checkout/#/pattern/server

For that ClientId/Secret it looks like the receiving account in the PayPal sandbox is from a country that cannot receive any payments, such as Bolivia. Create a new sandbox business account at https://www.paypal.com/signin?intent=developer&returnUri=https%3A%2F%2Fdeveloper.paypal.com%2Fdeveloper%2Faccounts%2F for a different country that is able to receive PayPal payments, and then create a REST app for this new sandbox business account in the 'My Applications' side tab.

It looks like you are using an obsolete PHP integration, with the old v1 payments SDK

You should instead use the v2 Checkout-PHP-SDK, with two routes, one for 'Set Up Transaction' and one for 'Capture Transaction', documented here: https://developer.paypal.com/docs/checkout/reference/server-integration/

Instead of redirecting to the approval URL, use this front-end UI: https://developer.paypal.com/demo/checkout/#/pattern/server -- this gives an "in context" checkout experience that keeps your site loaded in the background, which provides a much superior modern web experience

Payouts is for sending money from your account to another account. There is no form to show or log into. You are the API caller, and payments are automatically approved as coming from your account.

If you want a form for a user to approve paying from their account to some other account, use invoicing: https://developer.paypal.com/docs/invoicing/

Alternatively, maybe you don't need an invoice form but just a regular PayPal Checkout with a 'payee' recipient set: https://developer.paypal.com/docs/checkout/integration-features/custom-payee/

The PayPal-PHP-SDK is deprecated and should not be used for any new integration.

On the list of current SDKs you will find the Payouts PHP SDK.

You pretty much need to troubleshoot and solve that type of file path / file nonexistence error on your own; it's not an issue for the Stackoverflow community to remotely debug.

Moreover, the PayPal-PHP-SDK is deprecated and should not be used for any new integrations. You should be using the v2 Checkout-PHP-SDK.

• The composer package paypal/rest-api-sdk-php uses the REST API (v1) as referenced here: https://developer.paypal.com/docs/api/overview/

However I noticed there also appear to be /v2/ endpoints, as found here: https://developer.paypal.com/docs/api/orders/v2/ . I'm not sure why this package uses the v1 version; I couldnt find much information about it.

• The package srmklive/laravel-paypal uses the deprecated NVP/SOAP API. According to https://developer.paypal.com/docs/archive/express-checkout/, it is deprecated since January 1, 2017.

As quoted in the readme https://github.com/srmklive/laravel-paypal:

Currently only PayPal Express Checkout API Is Supported.

So you're probably better off using the first package. However I do remember that the APIs are not interchangeable, i.e. not all functions are implemented in both APIs. I remember vaguely something about recurring payments not available in one or the other.

Another reason you'd also want to use the first package is because it is a 1st party package (created by PayPal), so it's probably more complete and closer to the source.

You are looking for this front-end: https://developer.paypal.com/demo/checkout/#/pattern/server

For your backend, you should use the latest v2/orders SDK: https://github.com/paypal/Checkout-PHP-SDK

(Your v1/payments backend will work, but that SDK is deprecated and there is no reason to use it for a new integration)