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php - Paypal IPN not responding at all - Stack Overflow
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![Paypal Sandbox not redirecting on successful purchase [#2150533] | Drupal.org](https://www.drupal.org/files/issues/commerce_paypal-2013-12-05-15-44-02.png "Paypal Sandbox not redirecting on successful purchase [#2150533] | Drupal.org")
Paypal Sandbox not redirecting on successful purchase [#2150533] | Drupal.org
payment gateway - PayPal sandbox works, production does not work. Can anybody provide a solution? - Stack Overflow
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How to Integrate PayPal in PHP Applications
