addition of php documentation from ezyang's work in #200880.

only catch quotes around a string literal array index with lower case literals -- because define constants are ok, and define constants should be upper case

Fixed a typo for confirm_submit warning and changed hook_help warning to also
match on the word "function" before it.

db_result() calls that contained db_query()

D5

http://drupal.org/node/114774#book_module

encouraged to replace that with $severity WATCHDOG_DEBUG for consistency.

drupal_set_breadcrumb() should be used instead.

used instead.

cache_clear_all() should be used instead.

D6.

'administer permissions' and the path 'admin/user/access' has changed to
'admin/user/permissions'.

hook_enable/disable functions in node access modules in D6

matched by the rule itself.