[48658] documented that various metadata functions return false for an invalid ID. However, that does not clarify what an invalid ID is: a non-numeric, zero, or negative value. This change adds the clarification in all relevant metadata function docblocks.
Props icopydoc, SergeyBiryukov, davidkryzaniak, audrasjb.
Fixes#51797.
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When deleting a term, it has to be removed individually from each object it's connected to, which can take some significant time when there are a lot of objects.
By calling `wp_remove_object_terms()` when no default term is required, we can skip the terms fetch/diff step and significantly speed up the deletion process.
Props dd32.
Fixes#52549.
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Replace the `WP_Taxonomy` object with the taxonomy slug in the values passed to the actions `edit_term_taxonomy` and `edited_term_taxonomy` within `wp_modify_term_count_by_now()`.
Follow up to [49141], [49171].
Props Chouby, lcyh78.
Fixes#40351.
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Using the canonical function name for PHP functions is strongly recommended, as aliases may be deprecated or removed without (much) warning.
This replaces all uses of the following:
* `join()` with `implode()`
* `sizeof()` with `count()`
* `is_writeable()` with `is_writable()`
* `doubleval()` with a `(float)` cast
In part, this is a follow-up to #47746.
Props jrf.
See #50767.
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When modifying terms assigned to an object, replace full term recounts with incrementing/decrementing the count as appropriate. This provides a significant performance boost on sites with a high number of term/object relationships and/or posts.
Introduces the functions `wp_increment_term_count()`, `wp_decrement_term_count()`, `wp_modify_term_count_by()` and `wp_modify_term_count_by_now()` for updating the term count.
Introduces the function `_wp_prevent_term_counting()` for preventing double counting on posts that are about to transition.
Adds the parameter `update_count_by_callback` to `register_taxonomy()` to allow developers to use a custom callback for incrementing or decrementing a term count.
Props boonebgorges, davidbaumwald, hellofromTonya, johnbillion, lcyh78, mattoperry, peterwilsoncc, rebasaurus, whyisjake.
Fixes#40351.
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PHP 8 changes the way string to number comparisons are performed: https://wiki.php.net/rfc/string_to_number_comparison
In particular, checking if a non-empty, non-numeric string is greater than zero in PHP 8 evaluates to `true`, not `false`.
For `wp_insert_term()`, this resulted in a "Parent term does not exist" error for a non-numeric string, instead of discarding the value.
By explicitly casting the value to `int`, we make sure to compare both values as numbers, rather than a string and a number.
Follow-up to [29196], [29830], [29867].
See #50913.
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This brings `wp_count_terms()` in line with other taxonomy functions such as `get_terms()` which technically no longer require a taxonomy. Similar to the previously modified functions, no deprecation warning is triggered when using the legacy signature.
Fixes#36399.
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* Move default term assignment from `wp_set_object_terms()` to `wp_insert_post()`.
* Make sure the passed taxonomy list overwrites the existing list if not empty.
* Remove the default term option on `unregister_taxonomy()`.
* Prevent deletion of the default term in `wp_delete_term()`.
Props enrico.sorcinelli, TimothyBlynJacobs.
See #43517.
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The new default_term argument is added to `register_taxonomy()` allowing a user to define the default term `name` and optionally `slug` and `description`.
Fixes#43517.
Props enrico.sorcinelli, SergeyBiryukov, desrosj, davidbaumwald, whyisjake.
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This allows for hooking into both the create and update events with a single callback, in the same way that is already possible for posts via the `save_post` and `save_post_{$post->post_type}` actions.
Props dlh.
Fixes#48416.
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The tag was supported in phpDocumentor 1.x, but is no longer supported in 2.x and 3.x.
Usage of static variables is considered an internal implementation detail and has no information value for someone reading the docs.
Props alishanvr, jrf.
Fixes#50426.
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