Note down your Client ID and Secret Key for sandbox testing.<\/li>\n<\/ol>\nSandbox test account:<\/u><\/b>
\nNavigate to the Testing Tools \u2192 Sandbox Accounts<\/u> section in the PayPal Developer Dashboard and create a personal sandbox account to simulate buyer transactions during testing.<\/p>\nStep 2: Create Database and Table<\/h2>\n
Create a MySQL database and a table to store transaction details. Use the following SQL query to create the transactions<\/code> table:<\/p>\nCREATE<\/span> TABLE<\/span> IF<\/span> NOT<\/span> EXISTS<\/span> `transactions`<\/span> (\r\n `id`<\/span> int<\/span> NOT<\/span> NULL<\/span> AUTO_INCREMENT,\r\n `order_id`<\/span> varchar<\/span>(255<\/span>) NOT<\/span> NULL<\/span>,\r\n `transaction_id`<\/span> varchar<\/span>(255<\/span>) DEFAULT<\/span> NULL<\/span>,\r\n `payer_id`<\/span> varchar<\/span>(255<\/span>) DEFAULT<\/span> NULL<\/span>,\r\n `payer_email`<\/span> varchar<\/span>(255<\/span>) DEFAULT<\/span> NULL<\/span>,\r\n `payer_name`<\/span> varchar<\/span>(255<\/span>) DEFAULT<\/span> NULL<\/span>,\r\n `amount`<\/span> decimal<\/span>(12<\/span>,2<\/span>) DEFAULT<\/span> NULL<\/span>,\r\n `currency`<\/span> varchar<\/span>(10<\/span>) DEFAULT<\/span> NULL<\/span>,\r\n `status`<\/span> varchar<\/span>(50<\/span>) DEFAULT<\/span> NULL<\/span>,\r\n `created_at`<\/span> datetime DEFAULT<\/span> CURRENT_TIMESTAMP<\/span>,\r\n `raw_response`<\/span> longtext,\r\n PRIMARY KEY<\/span> (`id`<\/span>),\r\n UNIQUE<\/span> KEY<\/span> `order_id`<\/span> (`order_id`<\/span>)\r\n) ENGINE<\/span>=InnoDB<\/span> DEFAULT<\/span> CHARSET<\/span>=utf8mb4;<\/pre>\nStep 3: Configuration (config.php)<\/h2>\n
Create a config.php<\/code> file to store your PayPal API credentials, DB connection settings and product details. Also, create a utility function to establish a MySQLi connection.<\/p>\n\n- Product Details:<\/b> Define constants for product name (PRODUCT_NAME), price (PRODUCT_PRICE), and currency (PRODUCT_CURRENCY).<\/li>\n
- Database Settings:<\/b> Define constants for database host (DB_HOST), user (DB_USER), password (DB_PASS), and name (DB_NAME).<\/li>\n
- PayPal REST API Credentials:<\/b> Define constants for PayPal Client ID (PAYPAL_CLIENT_ID), Secret (PAYPAL_SECRET), and Sandbox mode (PAYPAL_SANDBOX: Set to FALSE for live mode).<\/li>\n
- Utility Function:<\/b> Create a function to establish and return a MySQLi connection.<\/li>\n<\/ul>\n
<?php
<\/span>\/\/ Product details (example)
<\/span>define<\/span>(<\/span>'PRODUCT_NAME'<\/span>, <\/span>'Example Product'<\/span>);
<\/span>define<\/span>(<\/span>'PRODUCT_PRICE'<\/span>, <\/span>'9.99'<\/span>);
<\/span>define<\/span>(<\/span>'PRODUCT_CURRENCY'<\/span>, <\/span>'USD'<\/span>);
<\/span>\/\/ Database settings
<\/span>define<\/span>(<\/span>'DB_HOST'<\/span>, <\/span>'localhost'<\/span>);
<\/span>define<\/span>(<\/span>'DB_USER'<\/span>, <\/span>'root'<\/span>);
<\/span>define<\/span>(<\/span>'DB_PASS'<\/span>, <\/span>''<\/span>);
<\/span>define<\/span>(<\/span>'DB_NAME'<\/span>, <\/span>'paypal_checkout_db'<\/span>);
<\/span>\/\/ PayPal REST API credentials
\/\/ For testing use sandbox credentials and set sandbox true
<\/span>define<\/span>(<\/span>'PAYPAL_CLIENT_ID'<\/span>, <\/span>'YOUR_PAYPAL_CLIENT_ID'<\/span>);
<\/span>define<\/span>(<\/span>'PAYPAL_SECRET'<\/span>, <\/span>'YOUR_PAYPAL_SECRET'<\/span>);
<\/span>define<\/span>(<\/span>'PAYPAL_SANDBOX'<\/span>, <\/span>TRUE<\/span>); <\/span>\/\/TRUE=Sandbox | FALSE=Production
\/\/ Utility: create mysqli connection
<\/span>function <\/span>get_db_connection<\/span>() {
<\/span>$mysqli <\/span>= new <\/span>mysqli<\/span>(<\/span>DB_HOST<\/span>, <\/span>DB_USER<\/span>, <\/span>DB_PASS<\/span>, <\/span>DB_NAME<\/span>);
if (<\/span>$mysqli<\/span>-><\/span>connect_errno<\/span>) {
<\/span>http_response_code<\/span>(<\/span>500<\/span>);
echo <\/span>json_encode<\/span>([<\/span>'error' <\/span>=> <\/span>'Database connection failed: ' <\/span>. <\/span>$mysqli<\/span>-><\/span>connect_error<\/span>]);
exit;
}
<\/span>$mysqli<\/span>-><\/span>set_charset<\/span>(<\/span>'utf8mb4'<\/span>);
return <\/span>$mysqli<\/span>;
}
<\/span>?><\/span><\/pre>\nStep 4: PayPal API Helper (paypal_api.php)<\/h2>\n
Create a paypal_api.php<\/code> file to handle PayPal API interactions. This file will include functions to get an access token, create an order, and capture payment.<\/p>\n<?php
<\/span>\/\/ Include config for constants
<\/span>require_once <\/span>__DIR__ <\/span>. <\/span>'\/config.php'<\/span>;
<\/span>\/\/ Define PayPal API base URL
<\/span>if (<\/span>PAYPAL_SANDBOX<\/span>) {
<\/span>define<\/span>(<\/span>'PAYPAL_BASE'<\/span>, <\/span>'https:\/\/api-m.sandbox.paypal.com'<\/span>);
} else {
<\/span>define<\/span>(<\/span>'PAYPAL_BASE'<\/span>, <\/span>'https:\/\/api-m.paypal.com'<\/span>);
}
<\/span>\/\/ Get PayPal access token
<\/span>function <\/span>paypal_get_access_token<\/span>() {
<\/span>$url <\/span>= <\/span>PAYPAL_BASE <\/span>. <\/span>'\/v1\/oauth2\/token'<\/span>;
<\/span>$ch <\/span>= <\/span>curl_init<\/span>(<\/span>$url<\/span>);
<\/span>curl_setopt<\/span>(<\/span>$ch<\/span>, <\/span>CURLOPT_RETURNTRANSFER<\/span>, <\/span>true<\/span>);
<\/span>curl_setopt<\/span>