How can PHP developers ensure proper configuration for displaying HTML-formatted debugging output, such as enabling html_errors in php.ini?

To ensure proper configuration for displaying HTML-formatted debugging output in PHP, developers can enable the `html_errors` directive in the `php.ini` file. This setting allows PHP error messages to be displayed in a more readable HTML format, making it easier to identify and troubleshoot issues.

// Enable HTML-formatted error messages in PHP
ini_set('html_errors', 1);