is_object_in_taxonomy( string $object_type, string $taxonomy ): bool
- Since
- 3.0.0
- Source
wp-includes/taxonomy.php:4945
Compatibility
- WordPress
- since 3.0.0
- PHP
- 7.4–8.6-dev
- 6.7.7
- 6.8.8
- 6.9.7
- 7.0.4
- 7.1.0
Present in every tracked release (6.7.7 to 7.1.0), and compiles on PHP 7.4 through 8.6-dev.
Parameters
$object_typestring- Object type string.
$taxonomystring- Single taxonomy name.
Return value
bool- True if object is associated with the taxonomy, otherwise false.
Performance profile
How much work a call to is_object_in_taxonomy() does, and what it touches: the algorithmic scaling, the Zend instruction count per call across PHP versions, the hooks it hands control to, and the core code that calls it. Measured from the compiled opcodes, not a stopwatch, so every number is identical on any machine running the same PHP version, and every function in core is ranked by cost.
- Cost class
- Trivial
- Scaling
- Constant
- Instructions
- 9–11
- Plugin surface
- None
- Called by
- 13
Touches nothing outside its own arguments.
No loop in the body: the same number of instructions runs whatever you pass in.
Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 12.
Nothing here hands control to plugin code.
13 places in core call this, so the cost is paid more often than your own code shows.
What one call costs · 1 distinct outcome
One number would be a lie: the work depends on which branch runs. These are every distinct cost is_object_in_taxonomy() can have, taken from its control-flow graph on PHP 8.5.
| When | Instructions | Calls it makes |
|---|---|---|
| always | 9–11 | get_object_taxonomies() |
Across PHP versions
| PHP | Compiled | Executed | Branches | Notes |
|---|---|---|---|---|
| 8.6-dev | 12 | 9–11 | 1 | |
| 8.5 | 12 | 9–11 | 1 | |
| 8.4 | 12 | 9–11 | 1 | 3 fewer instructions than PHP 8.3 |
| 8.3 | 15 | 9–14 | 1 | |
| 8.2 | 15 | 9–14 | 1 | |
| 8.1 | 15 | 9–14 | 1 | |
| 7.4 | 15 | 9–14 | 1 |
An instruction is not a fixed amount of time, so a matching count is not necessarily the same speed; what it rules out is a difference in the work itself.
Uses · 1
- get_object_taxonomies()Returns the names or objects of the taxonomies which are registered for the requested object or object type, such as a post object or post type name.
Used by · 13
- WP_Post::__get()Getter.
- WP_Posts_List_Table::categories_dropdown()Displays a categories drop-down for filtering on the Posts list table.
- WP_Posts_List_Table::formats_dropdown()Displays a formats drop-down for filtering items.
- WP_REST_Terms_Controller::check_read_terms_permission_for_post()Checks if the terms for a post can be read.
- WP_Screen::get()Fetches a screen object.
- get_adjacent_post()Retrieves the adjacent post.
- get_post_class()Retrieves an array of the class names for the post container element.
- get_the_category_list()Retrieves category list for a post in either HTML list or custom format.
- twentyten_posted_in()Print HTML with meta information for the current post (category, tags and permalink).
- wp_insert_post()Inserts or update a post.
- wp_set_post_categories()Sets categories for a post.
- wp_update_post()Updates a post with new post data.
Show all 13
- wp_xmlrpc_server::_prepare_page()Prepares page data for return in an XML-RPC object.
Source code
function is_object_in_taxonomy( $object_type, $taxonomy ) { $taxonomies = get_object_taxonomies( $object_type ); if ( empty( $taxonomies ) ) { return false; } return in_array( $taxonomy, $taxonomies, true );}Changelog
Introduced in 3.0.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
About this page
- Parsed data
- Generated from the wordpress-develop 6.8.8 tag, from
src/wp-includes/taxonomy.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it. - Corrections
- Something wrong on this page? Report it and it gets fixed in the next regeneration.