How can PHP sessions be managed to prevent conflicts when users open multiple windows or tabs in an e-commerce checkout process?

When users open multiple windows or tabs in an e-commerce checkout process, conflicts can arise with PHP sessions. To prevent this, we can use session_write_close() function to close the session after writing data and session_start() to start a new session when needed. This way, each window or tab will have its own session data without conflicting with others.

// Start the session
session_start();

// Write session data
$_SESSION['checkout_data'] = $checkout_data;

// Close the session
session_write_close();

// Start a new session if needed
session_start();