When is a do-while appropriate?

Question

When is a do-while the better choice over other types of loops? What are some common scenarios where its better than others?

I understand the function of a do-while,

Answer 1

I've used it before if I need to implement lots of conditional checks, for example processing an input form in php. Probably not the best practice, but it's more readable than many alternatives:

do {
   if ( field1_is_invalid ) {
      $err_msg = "field1 is invalid"; break;
   }

   if ( field2_is_invalid ) {
      $err_msg = "field2 is invalid"; break;
   }

   .. check half a dozen more things ..

   // Only executes if all checks succeed.
   do_some_updates();

} while (false)

Also, I guess this isn't technically a loop. More like a way of avoiding using GOTO :)