In what situations would using an iframe be a better solution than using PHP include functions for text retrieval?

Using an iframe would be a better solution than using PHP include functions for text retrieval when you want to display content from an external website or domain that you do not have control over. Iframe allows you to embed content from different sources while PHP include functions are limited to including files within the same server. Additionally, if you want to display content that requires a different server-side language or technology, using an iframe would be more suitable.

<iframe src="https://www.externalwebsite.com/content.php"></iframe>