How do you handle errors when using mail functions in PHP?

When using mail functions in PHP, you can handle errors by checking the return value of the mail() function. The mail() function returns a boolean value indicating whether the email was successfully accepted for delivery by the mail server. By checking this return value, you can detect if there was an error during the email sending operation. If the return value is false, you can display an error message, log the error, or execute alternative code paths. Additionally, you can use conditional statements and error handling techniques like try-catch blocks to handle exceptions that may occur during the email sending process. It's important to handle errors effectively to ensure successful email delivery in PHP.