- When user #1 creates an account (we can assume this happens only once), system.module's schema version is set to the latest availiable.
- system_get_files_database() now includes a 'schema_version' child of each file object.
- That new information is re-saved when Drupal re-populates the system table.
- An array of newly-enabled modules is built, module_list() is reloaded, and the schema versions of each newly-enabled module are set to the most recent availiable. If the schema version is already set (presumably from a previous installation) it is not changed.
Moves callbacks and arguments to a separate data structure from the visible menu tree. As mentioned on drupal-devel, this change has little impact except to slightly improve code legibility and prepare the code base for future separation of these tasks, with an eye toward performance improvements of the menu system. Also changes array_key_exists() to isset() in several places, which is reported to perform better.
1. hook_form_validate_alter and hook_form_execute_alter have been eliminated. there usage was limiting and a bit confusing. now, only hook_form_alter remains
2. replacing those hooks are the #validate and #execute attributes. these can be used either when building the form in a module, or via hook_form_alter. these attributes are built in array form, to allow for flexibility in how they are called. for example, a module could simply add an element to the #validate array via hook_form_alter if it wished to perform additional validation, or it could redeclare the entire #validate array if it wanted to override any existing validation
3. attributes #validation_arguments and #execution_arguments have been added to allow args to be used w/ custom validation and execution functions. this are also declared in array format
4. renamed #valid attribute to #validation. this doesn't cause any conflicts, and makes the naming convention more consistent
5. renamed the existing #execute attribute associated w/ submit buttons to #submit
Dries Buytaert
Steven Wittens