With the Widget Customizer it's possible that previewed widgets can leak data outside of Customizer, when the widget uses the cache API.
The Customizer calls the regular update callback which should already refresh the cache. Since cache additions aren't blocked yet the cache can be filled with preview data.
To prevent this issue `WP_Widget::is_preview()` will return true, when `$wp_customize->is_preview()` returns true. If `is_preview()` is true, cache additions are suspended via `wp_suspend_cache_addition()`. Make sure your object cache drop-in has implemented `wp_suspend_cache_addition()`.
`is_preview()` can/should also be used inside `WP_Widget::widget()`, see WP_Widget_Recent_Posts or WP_Widget_Recent_Comments for examples.
For more info see IRC logs: http://irclogs.wordpress.org/chanlog.php?channel=wordpress-dev&day=2014-04-02&sort=asc#m824279
props westonruter.
fixes#27538.
git-svn-id: https://develop.svn.wordpress.org/trunk@27966 602fd350-edb4-49c9-b593-d223f7449a82
New hooks are `dynamic_sidebar_before`, `dynamic_sidebar_after`, `dynamic_sidebar_has_widgets ` and `is_active_sidebar`.
Remove obsolete use of hacky dynamic_sidebar hook.
props westonruter, DrewAPicture.
fixes#25368.
git-svn-id: https://develop.svn.wordpress.org/trunk@27543 602fd350-edb4-49c9-b593-d223f7449a82
* All WordPress files move to a src/ directory.
* New task runner (Grunt), configured to copy a built WordPress to build/.
* svn:ignore and .gitignore for Gruntfile.js, wp-config.php, and node.js.
* Remove Akismet external from develop.svn. Still exists in core.svn.
* Drop minified files from src/. The build process will now generate these.
props koop.
see #24976.
and see http://wp.me/p2AvED-1AI.
git-svn-id: https://develop.svn.wordpress.org/trunk@25001 602fd350-edb4-49c9-b593-d223f7449a82
