Introduction to PayPal：
PayPal allows you to accept a variety of payment types wherever you sell online or in-person. You can even send invoices with the option to pay by credit card, debit card, or PayPal.
I. Applying for PayPal Payment
1.Apply for a PayPal account. √ Visit https://www.paypal.com to apply for a PayPal account. √ Perform account authentication and bank card binding as prompted.
2.Obtain payment collection parameters. √ Use your account to log in to the PayPal Developer platform at https://developer.paypal.com √ Click My Apps & Credentials and click Create App under REST API apps. √ Specify the app name and click Create App.
II.Obtaining PayPal Payment Parameters
PayPal account: registered PayPal corporate account, which, by default, is an email address. Client ID and Secret: Access https://developer.paypal.com/developer/applications/, click the app name, and click Live. The values of Client ID and Secret are displayed on the page.