Boone Gorges ed639b408a Split shared taxonomy terms on term update. ... When updating an existing taxonomy term that shares its `term_id` with another term, we generate a new row in `wp_terms` and associate the updated term_taxonomy_id with the new term. This separates the terms, such that updating the name of one term does not change the name of any others. In cases where a plugin or theme stores term IDs in the database, term splitting can cause backward compatibility issues. The current changeset introduces two utilities to aid developers with the transition. The `'split_shared_term'` action fires when the split takes place, and should be used to catch changes in term_id. In cases where `'split_shared_term'` cannot be used, the `wp_get_split_term()` function gives developers access to data about terms that have previously been split. Documentation for these functions, with examples, can be found in the Plugin Developer Handbook. WordPress itself stores term IDs in this way in two places; `_wp_check_split_default_terms()` and `_wp_check_split_terms_in_menus()` are hooked to `'split_shared_term'` to perform the necessary cleanup. See [30241] for a previous attempt at the split. It was reverted in [30585] for 4.1.0. Props boonebgorges, mboynes. See #5809. git-svn-id: https://develop.svn.wordpress.org/trunk@31418 602fd350-edb4-49c9-b593-d223f7449a82		2015-02-11 19:41:54 +00:00
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cache.php	Update individual term caches in get_terms().	2014-12-17 16:38:44 +00:00
categoryExists.php	Default $parent in category_exists() should default to null rather than 0.	2015-01-11 01:25:19 +00:00
getTerms.php	Ensure that 'hierarchical' is respected in get_terms() when multiple taxonomies are passed.	2015-01-26 19:03:09 +00:00
isObjectInTerm.php	In in_object_in_term(), only check numeric string values against term_id.	2014-11-03 14:24:23 +00:00
query.php	Improve WP_Tax_Query param sanitization for empty strings.	2014-10-26 22:56:36 +00:00
slashes.php	Move PHPUnit tests into a tests/phpunit directory.	2013-08-29 18:39:34 +00:00
splitSharedTerm.php	Split shared taxonomy terms on term update.	2015-02-11 19:41:54 +00:00
termExists.php	Move term_exists() tests to their own file.	2014-10-30 18:52:37 +00:00
wpDeleteObjectTermRelationships.php	Add tests for wp_delete_object_term_relationships().	2015-01-02 14:02:54 +00:00
wpGetObjectTerms.php	Introduce 'parent' parameter to wp_get_object_terms().	2015-01-23 14:56:04 +00:00