A payment gateway is a merchant service provided by an e-commerce application service provider that authorizes credit card or direct payments processing for e-businesses

To integrate payment gateway in your PHP-based website, you need to implement the following functionalities.

1. Prepare the HTML form to collect credit card information.
2. Create token to securely transmit card information.
3. Submit the form with card details.
4. Verify the card and process charges.
5. Insert payment details in the database for status to be shown to the user.

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