Is there a specific PHP function or attribute that can disable certain browser functionalities like image toolbars?

To disable certain browser functionalities like image toolbars, you can use the `header()` function in PHP to send specific HTTP headers to the browser. One common header you can use is `X-Frame-Options` with the value `DENY` to prevent the browser from displaying image toolbars or other similar functionalities.

header("X-Frame-Options: DENY");