Version 3.6

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On August 1, 2013, WordPress Version 3.6, named for Oscar Peterson, was released to the public. For more information on this enhancement and bug-fix release, read the WordPress Blog, the Release Post, and see the Changelog for 3.6.

For Version 3.6, the database version (db_version in wp_options) changed to 24448, and the Trac revision was r24973.

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Highlights 

  • New Default Theme – Twenty Thirteen
    • Focus on blogging
    • Single column layout with Sidebar / Widgets in the footer
    • Latest Theme Features support, particularly Post Formats and Theme Markup
    • Font-based icons (Genericons)
  • Admin Enhancements
    • UI improvements on Navigation Menus Screen
    • Revisions revised to be more dynamic and scalable
    • Autosave and Post Locking
    • Preview Audio and Video on Media Edit Screen
    • In-line login following expired sessions
  • For Developers
    • External Libraries have been updated. More Info
    • New audio/video APIs give developers access to powerful media metadata, like ID3 tags.
    • Filters for revisions, allowing you to set the number of revisions ad hoc instead of only via a define. More Info
    • Theme Markup allows themes to choose improved HTML5 markup for search forms, comment forms, and comment lists.
    • Search content for shortcodes with has_shortcode() and adjust shortcode attributes with a new filter.

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What’s New 

General 

  • Use digraphs for German umlauts in remove_accents()
  • Use Ellipses instead of …
  • Consistently apply ‘register’ filter
  • Automatically esc_url() the URL echoed by the_permalink()
  • Allow developers to specify an Accept-Encoding header in WP_Http::accept_encoding()
  • Pass tag object and args array to topic_count_text_callback from wp_generate_tag_cloud()
  • Use wp_unslash() instead of stripslashes_deep
  • Improve the performance of backslashit() by avoiding regular expressions
  • Disallow accidental or negligent deregistering of critical scripts in the admin. Covers jQuery, jQuery UI, Underscore, and Backbone
  • Remove the_title_attribute() from anchors with the_title() as text
  • Display username (user_login) rather than user_nicename in Toolbar below username

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Posts 

  • The Revision Management UI saw significant improvement
  • Shortcode attributes can now be filtered via shortcode_atts_$shortcode hook
  • The ability to change post formats was removed from Quick Edit
  • A ‘not_found’ label was added for non-hierarchical taxonomys
  • Better UX for dealing with multiple users editing the same content (aka Post Locking)
  • Audio/Video support More Info

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Media 

  • Add oEmbed support for Rdio and Spotify
  • .webm (video/webm) was added to the MIME types list
  • The Media Library can now be sorted by Author name
  • Bug fixed where initial gallery link-to setting wasn’t applied
  • Return from image_downsize() earlier if a custom resize function is used
  • Orientation information was added to items in gallery_shortcode()
  • New Audio and Video previews are available on the Media > Edit Screen
  • Added wp_audio_shortcode() and wp_video_shortcode()

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Comments 

  • Improve wp_list_comments() markup
  • Add the ability to use HTML5 input types in the comment form

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Appearance 

  • The Navigation Menus UI got a significant refresh
  • The Customizer can now be accessed via the Appearance menu
  • Screen options can now be added to the Appearance > Widgets Screen

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Plugins 

  • Prevent plugins from overriding jQuery in the admin
  • Prevent plugins with certain filenames from breaking links in the admin menu

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Users 

  • Remove the three default contact methods (AIM, YIM, Jabber) for new installs.
  • Pass old roles to set_user_role action
  • The workflow for deleting users has been improved

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Settings 

  • Allow any post format to be set as default in Settings > Writing Screen

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Accessibility

  • Better keyboard/screen reader accessibility in the Nav Menus UI
  • Background image’s “select a file” link works with keyboard navigation

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Under The Hood 

General 

  • Use official MIME types for Windows Media file extensions
  • Redirect after save on options-permalink.php to ensure permalinks are fully flushed
  • Only show database errors if both WP_DEBUG and WP_DEBUG_DISPLAY are enabled

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Bug Fixes 

  • Strip slashes from passwords sent to new users by email
  • Make sure the url returned by post_preview() is filterable with preview_post_link
  • Fix handling of ‘0’ as meta_value argument in get_pages()
  • Correctly print ‘after’ data when scripts are concatenated in WP_Styles class
  • Properly truncate UTF-8 post slugs in wp_unique_post_slug()
  • Avoid PHP notices in Media Library if an attachment parent does not exist
  • Fix some tabbing issues on the post editing screen
  • Avoid notice by checking for user agent in wp_new_comment()
  • Avoid notice in parent_dropdown() by checking if post exists before testing post id
  • Prevent an unintended visibility change from “Password protected” to “Public” when updating the post
  • Avoid a warning in mb_internal_encoding by making sure we have a charset first
  • Fix unnecessarily persistent “pending email change” admin message
  • Ensure we strictly compare ‘all options’ and ‘not options’ when protecting these special options
  • Make sure to reset the modal after gallery insertion
  • Add sanity checks on image metadata to avoid warnings
  • Avoid an undefined index notice in get_post_type_archive_feed_link()
  • Avoid notices when array args are missing in WP_Image_Editor::multi_resize()
  • Fix notice in wp_generate_attachment_metadata()
  • Avoid PHP notices when deleting or restoring an item that no longer exists

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Multisite 

  • Pass blog_id to the wpmu_drop_tables filter

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Classes 

  • XML-RPC: Return an error for getRecentPosts (mw and blogger) if the user does not have edit_posts
  • XML-RPC: Standardize home/site url labels with core labels
  • Preserve alpha in WP_Image_Editor_GD when images are not resized
  • Make sure WP_Http funnels all redirect requests through WP_Http::request() to ensure the proper transport is used

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Functions 

  • An arg parameter was added for wp_nonce_url()
  • Allow paths with two consecutive dots to be passed to home_url() and all related *_url() functions
  • Document 7th parameter, $callback_args in add_meta_box()
  • Confirm a user exists before deleting them in wp_delete_user() and wpmu_delete_user()
  • Return WP_Error from wp_crop_image() if saving has failed
  • Bail early with correct WP_Error if invalid post ID passed to wp_insert_post()
  • Remove duplicate calls to add_new_user_to_blog()
  • Introduce wp_add_id3_tag_data()
  • Introduce wp_read_video_metadata()
  • Introduce wp_read_audio_metadata()
  • Introduce wp_nav_menu_disabled_check()
  • Introduce wp_nav_menu_update_menu_items()
  • Introduce do_accordion_sections()
  • Introduce wp_slash()
  • Introduce wp_unslash()
  • Introduce wp_is_writable()
  • Introduce wp_auth_check_load()
  • Introduce wp_auth_check()
  • Introduce get_tag_regex()
  • Introduce wp_registration_url()
  • Introduce wp_heartbeat_settings()
  • Introduce wp_mediaelement_fallback()
  • Introduce wp_get_audio_extensions()
  • Introduce wp_audio_shortcode()
  • Introduce wp_get_video_extensions()
  • Introduce wp_video_shortcode()
  • Introduce wp_embed_handler_audio()
  • Introduce wp_embed_handler_video()
  • Introduce get_attached_media()
  • Introduce get_post_galleries()
  • Introduce get_post_galleries_images()
  • Introduce get_post_gallery()
  • Introduce get_post_gallery_images()
  • Introduce wp_post_revision_title_expanded()
  • Introduce paginate_content()
  • Introduce get_paged_content()
  • Introduce wp_revisions_enabled()
  • Introduce wp_revisions_to_keep()
  • Introduce wp_text_diff_with_count()
  • Introduce shortcode_exists()
  • Introduce has_shortcode()
  • Introduce wp_parse_post_content()
  • Introduce wp_remove_object_terms()
  • Introduce wp_add_object_terms()

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Filters 

  • Add self_link in self_link()
  • Add get_comments_link in get_comments_link()
  • Add comments_link_feed in comments_link_feed()
  • Add comment_link in get_comment_link()
  • Add nav_menu_link_attributes in Walker_Nav_Menu::start_el()
  • Add wp_revisions_to_keep in wp_revisions_to_keep()
  • Add wp_link_pages in wp_link_pages()
  • Add search_form_format in get_search_form()
  • Add user_search_columns in WP_User_Query::prepare_query()
  • Add wp_http_accept_encoding in WP_Http_Encoding::accept_encoding()
  • Add widget_meta_poweredby in WP_Widget_Meta::widget()

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Scripts, External Libraries 

  • Update to jQuery Color 2.2.1
  • Update to Backbone 1.0.0
  • Update to jQuery UI 1.10.3
  • Services_JSON 1.0.3
  • Iris 1.0.3
  • hoverIntent r7
  • MediaElement.js 2.11.1 (New)
  • getid3 1.9.7 (New)

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Deprecated 

  • Deprecate wp_convert_bytes_to_hr() in favor of size_format()
  • Deprecate get_user_id_from_string() in favor of get_user_by() where `$field` is ’email’ or ‘login’
  • Deprecate wpdb::escape() in favor of wpdb::prepare() or esc_sql()
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