Dear All,
I am trying to create a custom block per Tomlinson's Beginning Drupal 7.0 on page 81.
He instructs one to go to Structure; Blocks; add new block. then further:
He says " after entering the (PHP) code, change the Text format select list from Filtered HTML to PHP code". I only see options for filtered HTML; Full HTML or Plain Text. No "PHP code".
How come?

Thanks
Tony