What potential pitfalls should be considered when using PHP for printing on a Linux server?

One potential pitfall when using PHP for printing on a Linux server is ensuring that the correct permissions are set for the printer. This includes making sure that the web server user (such as www-data) has permission to access and send print jobs to the printer. Additionally, it's important to handle errors and exceptions that may occur during the printing process to prevent any disruptions in the server's operation.

// Set the correct permissions for the printer
exec("sudo chown www-data:www-data /dev/printer");

// Handle errors and exceptions during printing
try {
    // Code to send print job to the printer
} catch (Exception $e) {
    echo "An error occurred while printing: " . $e->getMessage();
}