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How to Integrate PayPal Payment System in PHP & MySQL
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How to Integrate PayPal Payment System in PHP & MySQL

June 15th, 2025 Huzoor Bux API, Payment, PHP 2 comments

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I received a tutorial requests from my reader that asked to me how to implement a payment gateway system with PayPal API. In this tutorial I want to explain how to work with Paypal Sandbox test accounts for payment system development and sending arguments while click buy now button. It’s simple and very easy to integrate into your web projects.

DEMO
DOWNLOAD CODE

Create a Paypal Sandbox account at https://developer.paypal.com/

Step 2

Now create test accounts for payment system. Take a look at Sandbox menu left-side top Sandbox->Test Accounts

Step 3

Here I have created two accounts Buyer (personal) and Seller (merchant/business)

 

index.php

Contains PHP code. Displaying products, product image, product name, and product price. Here you have to give your business(seller) $paypal_id id. Modify PayPal button form return and cancel_return URLs.

<?php

$paypal_url='https://www.sandbox.paypal.com/cgi-bin/webscr'; // Test Paypal API URL

$paypal_id='your_seller_id'; // Business email ID

?>

<h4>Welcome, Guest</h4>



<div class="product">            

    <div class="image">

        <img src="https://phplift.net/wp-content/uploads/2017/01/logo.png" />

    </div>

    <div class="name">

        PHPGang Payment

    </div>

    <div class="price">

        Price:$10

    </div>

    <div class="btn">

    <form action="<?php echo $paypal_url; ?>" method="post" name="frmPayPal1">

    <input type="hidden" name="business" value="<?php echo $paypal_id; ?>">

    <input type="hidden" name="cmd" value="_xclick">

    <input type="hidden" name="item_name" value="PHPLift Payment">

    <input type="hidden" name="item_number" value="1">

    <input type="hidden" name="credits" value="510">

    <input type="hidden" name="userid" value="1">

    <input type="hidden" name="amount" value="10">

    <input type="hidden" name="cpp_header_image" value="https://phplift.net/wp-content/uploads/2017/01/logo.png">

    <input type="hidden" name="no_shipping" value="1">

    <input type="hidden" name="currency_code" value="USD">

    <input type="hidden" name="handling" value="0">

    <input type="hidden" name="cancel_return" value="https://demos.phplift.net/payment-with-paypal-using-phpcancel.php">

    <input type="hidden" name="return" value="https://demos.phplift.net/payment-with-paypal-using-php/success.php">

    <input type="image" src="https://www.sandbox.paypal.com/en_US/i/btn/btn_buynowCC_LG.gif" border="0" name="submit" alt="PayPal - The safer, easier way to pay online!">

    <img alt="" border="0" src="https://www.sandbox.paypal.com/en_US/i/scr/pixel.gif" width="1" height="1">

    </form> 

    </div>

</div>

success.php

Paypal payment success return file. Getting Paypal argument like item_number. Paypal data success.php?tx=83437E384950D&st=Completed&amt=10.00&cc=USD&cm=&item_number=1

<?php

$item_no            = $_REQUEST['item_number'];

$item_transaction   = $_REQUEST['tx']; // Paypal transaction ID

$item_price         = $_REQUEST['amt']; // Paypal received amount

$item_currency      = $_REQUEST['cc']; // Paypal received currency type



$price = '10.00';

$currency='USD';



//Rechecking the product price and currency details

if($item_price==$price && $item_currency==$currency)

{

    echo "<h1>Welcome, Guest</h1>";

    echo "<h1>Payment Successful</h1>";

}

else

{

    echo "<h1>Payment Failed</h1>";

}

cancel.php

Paypal API cancel_return file.

<?php

echo "<h1>Welcome, Guest</h1>";

echo "<h1>Payment Canceled</h1>";

?>

 Step 4

When your web application test payment system workflow is completed. Change the form action development API URLs to original API URLs and give valid $paypal_id seller email id.

$paypal_url='https://www.sandbox.paypal.com/cgi-bin/webscr';

//to

$paypal_url='https://www.paypal.com/cgi-bin/webscr';

That’s all.

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Previous article 10 Best Food Delivery Apps Systems for Small Restaurants

Huzoor Bux

I am a PHP Developer

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2 Comments

  1. saurabh
    October 3, 2020 at 12:02 pm Reply ↓

    Thanks for sharing a good information.

    But, i am getting an issue with it as i am not getting the transaction information return on return URL.

    It is giving me blank information.

    Need help with it to fix.

    Thanks

  2. Mark
    March 28, 2022 at 8:27 am Reply ↓

    I am looking for soemthing simialr ot this but for subscriptions, where if a payment is not made or subscription cancelled then a users account is restricted.

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