Payment gateways are point of sale (POS) terminals that collect credit card information through card or smartphone in physical stores. Payment gateways are the "checkout" portals that online stores utilise to submit credit card information or credentials for services like PayPal.
A payment gateway is an online payment service that is designed to make and receive payments when it is coupled with an e-commerce platform. The consumer must fill in some information, such as credit/debit card number, expiration date, and CVV, in order to receive payments.
PHP Script for PayPal Advanced Payment Terminal.
PayMoney - Online Payment Gateway that is safe and secure.
Wallet King — API-enabled online payment gateway
WalletPRO - Dynamic Payment Gateway WalletPRO is a dynamic payment gateway.
eWallet - Online Payment Gateway Script is a script that allows you to accept payments online.
phpWallet - PHP Script for Online Payment Gateway
To use the Authorize.Net API, import the PHP SDK. Create a payment form to collect the user's credit card information. Set up API credentials and initiate the payment process. Take care of the API response and save the information in the database.
Register for Paytm Account. Sign Up for a Paytm business account from here: https://paytm.com/business/payments/online.
Get the Paytm PHP Kit from the official Paytm website.