Paytm Payment Gateway Integration in PHP

This repository contains the PHP code for integrating Paytm Payment Gateway into a web application. The integration allows for initiating transactions, checking their status, and handling the response from Paytm after the transaction is processed.

Tech Stack

• PHP: Server-side scripting language used for backend logic.
• HTML: Used for structuring the web pages.
• Paytm Payment Gateway API: For handling payments.

Pages and Functionality

1. TxnTest.php

This is the initial page where the user inputs transaction details such as order ID, customer ID, industry type, channel, and transaction amount.

• Order ID: Generated dynamically for each transaction.
• Customer ID: Predefined as 'CUST001'.
• Industry Type ID: Set as 'Retail'.
• Channel: Set as 'WEB'.
• Transaction Amount: User input.

2. pgRedirect.php

This page is responsible for sending transaction data to Paytm's server. It generates a checksum hash to ensure data integrity.

• Checksum Generation: For security, a checksum hash is generated and sent along with the transaction data.

3. pgResponse.php

This page handles the response from Paytm after the transaction processing.

• Checksum Verification: It verifies the checksum received from Paytm.
• Transaction Status: Displays whether the transaction was successful or failed.

4. TxnStatus.php

This page allows the user to query the status of a transaction by providing the order ID.

• Order ID Input: User can input the order ID to check the transaction status.
• Transaction Status: Shows the detailed status of the transaction.

How to Use

1. Clone the repository to your local server environment.
2. Configure the config_paytm.php with your Paytm merchant details.
3. Access TxnTest.php to start a new transaction.
4. Use TxnStatus.php to check the status of a transaction.

Security and Data Integrity

• Checksum Hash: Ensures that the data sent to and received from Paytm's server is not tampered with.
• HTTPS Protocol: It is recommended to use HTTPS to ensure secure data transmission.

Requirements

• PHP 7 or higher.
• Paytm Merchant account for API keys and testing.

Installation

1. Download or clone the repository.
2. Place it in your server's document root.
3. Configure the Paytm API keys in config_paytm.php.
4. Access the pages via a web browser.

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For more details on Paytm's API and parameters, visit Paytm Developer Documentation.

Note: This is a basic implementation and should be used as a starting point. Ensure to follow security best practices for production deployment.