Inserting a form into a block in Drupal?

Question

Is there any command or method that I can use to insert the contents of a form (e.g. the user registration form) into a block?

Answer 1

One other thing is that it puts some of the PHP code into the database, instead of in the filesystem where the rest is. It's easy to forget and waste a lot of time searching for the code, and grep is a lot more convenient that going through every block and seeing if the PHP is there.