The current version of these files is 1.2

1.0 -- 2nd edition, book version

1.1 -- Bug fixes
  (1) Changed line 8 of ch11/home.php (Example 11-12) to sessionAuthenticate();

1.2 -- Bug Fixes
  (1) Changed line 30 of ch11/db.inc (Example 11-2 uses this) to EscapeShellCmd()
      [thanks to Luke Powers]
  (2) Changed lines 26 and 30 of ch04/example.4-2.php (Example 4-2) to read
      as shown in the book [the book is fine, the download was incorrect]
      [thanks to Cy Unpingco]