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Phiên bản 2.8

On April xxth, 2009, WordPress Version 2.8, named for xxxxxxxxxxxxxxx, will be released to the public. For more information on this enhancement and bug-fix release, read the Development Blog and see the Changelog for 2.8.

For Version 2.8, the database version (db_version in wp_options) changed to xxxx, and the Trac revision was xxxxx

Contents

New Features

User Features

  • New Theme Installer routines
  • Add CodePress syntax highlighting to Theme and Plugin editors
  • Use "Custom Header" for menu text and revise Default theme to reflect change
  • Separate Comments into a separate postbox, from Discussion postbox, on the Edit Post screen
  • Don't ask for confirmation when marking a comment as spam
  • Allow the dashboard widgets to be arranged in up to four columns as set via the Screen Options tab
  • Make titles into links in Dashboard Right Now module (this was in 2.7.1)
  • Improved Admin icons (grey-to-transparent shadows)
  • Press This improvements UI, quoting fixes, plus ability for Contributors to use Press This
  • Improve installer to help people entering wrong email addresses
  • Improved Widget user interface
  • Allow editing of all plugin files (Ticket 6732)
  • Improved Plugin search (this was in 2.7.1)
  • Move "Install a plugin in .zip format" to new Upload tab under Administration > Plugins > Add New
  • Show absolute date instead of relative date for scheduled posts
  • Fix tags suggest for post quick edit and bulk edit
  • Permalink editor changes and fix for pages
  • Autosave post/page when pressing Control/Command+S
  • Add toggle all button to the Gallery tab in the uploader
  • Add per page option to Screen Options for comments, posts, pages, media, categories, and tags
  • Overhaul of LiveJournal importer (also add define WP_IMPORTING)
  • Show Tools menu for all users so they can access Turbo
  • Check for new version when visiting Tools->Upgrade
  • Fix most popular link category list
  • Add tag description

Development, Themes, Plugins

  • Improved database performance
  • Drop post_category column from wp_posts table, and link_category column from wp_links schemas
  • Fix delete statements to ensure data integrity when innodb and foreign keys are used
  • Enforce consistent ID types to allow for foreign keys to be defined between tables
  • Add Sticky to list of post states
  • Add a filter to the post states list
  • Introduction and widespread use of transient and related fiters
  • Add filters so AIM, Yahoo, and Jabber IM labels, in user profile, can be changed
  • Add hook "after_db_upgrade"
  • Add hooks for the Users, Categories, Link Categories, and Tags table columns
  • HTTP API updates and fixes
  • Add support for blocking all outbound HTTP requests
  • Updated List of HTTP status codes (Ticket 9297)
  • Use SimplePie for widget and dashboard feeds
  • Switch to pomo lib. Support gettext contexts. Deprecate long form functions
  • TinyMCE 3.2.2.3
  • Use Jcrop for cropping
  • Improved performance for script loading
  • Improved archive and calendar queries
  • Cron spawning improvements
  • Timezone enhancements for PHP 5
  • Add WP_Widget class and move native widgets into WP_Widget
  • Allow other taxonomies (e.g. post categories) to be used with wp_tag_cloud (Changeset 10554)
  • Allow a plugin to control how many posts are displayed on edit pages
  • Add "style" and "html" arguments to wp_list_authors (Ticket 4420)
  • Add "exclude_tree" argument to wp_list_categories and make exclude behave like exclude_tree when hierarchical is specified--this was actually a 2.7.1 change (Ticket 8614)
  • New Template Tag, the_modified_author (Ticket 9154)
  • Enhanced support for custom taxonomies
  • Put page title before blog name in admin title (Ticket 9028)
  • Use https://api.wordpress.org/secret-key/1.1/ for the WordPress.org secret-key service
  • Various phpDoc updates
  • Refactor filters to avoid potential XSS attacks
  • XMLRPC improvements
  • Improved mysql2date coding
  • Make authentication more pluggable
  • Switch to using the ID when calling get_avatar internally to support caching plugins
  • Allow plugins to provide a canonical redirect_url even if WordPress does not provide its own
  • Drafts have post_date populated now, so look for a zeroed out post_date_gmt to determine non-scheduled nature
  • Fixes to query_posts (obey post_type, drop orderby=category, use group by for meta key queries, remove meta_value from selected fields)
  • Allow a plugin to filter the classes applied in wp_list_pages()
  • Functions (get_adjacent_post_rel_link and adjacent_post_rel_link) to display relational links for adjacent posts in the head (Ticket 8703)
  • Add the sticky post grey background to the default theme
  • Proxy support
  • Let a plugin filter the expanded capabilities returned by map_meta_cap
  • Allow the update period to be filtered in RSS/RDF feeds
  • Store field types in wpdb object
  • Add tag description functions tag_description and term_description
  • Updated Trac

Advanced Features

JS script loader Improvements

  • jQuery 1.3.2
  • Improvements to the script loader: allows plugins to queue scripts for the front end head and footer, adds hooks for server side caching of compressed scripts, adds support for ENFORCE_GZIP constant (deflate is used by default since it's faster)
  • Load the minified versions of the scripts by default, define('SCRIPT_DEBUG', true); can be used to load the development versions
  • Remove events from categories chechboxes in quick edit to speed up page unload
  • Make simple form validation and ajax-add new categories compatible with jQuery 1.3.1
  • Load farbtastic.js has to be loaded in the head
  • Note: see Lester Chan's Loading Javascript in Footer blog and Andrew Ozz's Script Loader Updates blog

New Widgets API

WP_Widget is a class that abstracts away much of the complexity involved in writing a widget, especially multi-widgets.

  • Basically, you extend WP_Widget with your own class that provides a constructor and three methods -- widget(), form(), and update().
    • widget() - outputs the actual content of the widget.
    • update() - processes options to be saved.
    • form() - outputs the options form.
  • A widget is registered by passing the name of the widget class to register_widget().
  • All widgets written with WP_Widget are multiple instance capable.
  • Options
    • Options for old single-instance widgets ported to WP_Widget will be upgraded to the new multi-option storage format, which is simply a multi-dimensional array keyed by instance ID.
    • Options for widgets using the old multi-instance pattern should work as is.
    • If your widget has custom option storage needs, you can provide your own get_settings() and save_settings() methods.
  • The WP_Widget source can be viewed here (read the phpdoc for moreinfo on usage): http://core.trac.wordpress.org/browser/trunk/wp-includes/widgets.php
  • You can see examples of how to use it here: http://core.trac.wordpress.org/browser/trunk/wp-includes/default-widgets.php
  • If you author any widgets, try porting them to WP_Widget and give your feedback on what can be improved an Trac Ticket 8441.
  • Props to the MultiWidget class, on which WP_Widget is based: http://blog.firetree.net/2008/11/30/wordpress-multi-widget/
  • The above extracted from Ryan Boren's wp-hackers post.

Features That Didn't Make it into Version 2.7

These features didn't make it into 2.7, but there's hope that they might make it into 2.8.

  • Some default shortcodes, maybe the most popular 10 from WordPress.com
  • oEmbed support, tied in with shortcodes
  • Better UI for post revisions, maybe an optional field to say what changed in a version
  • Widget UI overhaul (Ticket 6556)
  • OAuth support
  • GeoData for posts, comments, attachments, etc.
  • Duplicate post Tags UI for other taxonomies (Ticket 6387)
  • Template tags to do everything the custom gallery on ma.tt does
  • Codepress code highlighting for template editing --
  • Menu editor
  • Unbalanced tags across more and nextpage tags (Ticket 6297)
  • Sitemaps by default
  • Refresh of the importers
  • Gallery post_type
  • Versioning of template edits
  • Documentation links for functions used in currently edited template
  • MPTT for hierarchies
  • Method for uploading and installing themes directly in the Wordpress UI
  • Add support for blocking all outbound HTTP requests