In what situations would using frames be a viable option for sharing data between PHP websites, and what are the potential drawbacks of this approach?

Using frames to share data between PHP websites can be a viable option when you want to display content from one website within another website without redirecting the user. This can be useful for displaying dynamic content, such as widgets or live feeds, from one site onto another. However, using frames can have drawbacks such as SEO issues, security vulnerabilities, and potential compatibility problems with certain browsers.

<iframe src="https://www.example.com/external-content.php"></iframe>