register_taxonomy_for_object_type( string $taxonomy, string $object_type ): bool
- Since
- 3.0.0
- Source
wp-includes/taxonomy.php:768
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
$taxonomystring- Name of taxonomy object.
$object_typestring- Name of the object type.
Return value
bool- True if successful, false if not.
Performance profile
How much work a call to register_taxonomy_for_object_type() does, and what it touches: the algorithmic scaling, the Zend instruction count per call across PHP versions, the hooks it hands control to, and the core code that calls it. Measured from the compiled opcodes, not a stopwatch, so every number is identical on any machine running the same PHP version, and every function in core is ranked by cost.
- Cost class
- Trivial
- Scaling
- Constant
- Instructions
- 6–32
- Plugin surface
- 1 hook
- Called by
- 1
Touches nothing outside its own arguments.
No loop in the body: the same number of instructions runs whatever you pass in.
Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 34.
Third-party callbacks on 'registered_taxonomy_for_object_type' run inside this call, and their cost is not bounded by anything here.
1 place in core call this, so the cost is paid more often than your own code shows.
What it touches
- hookthird-party callbacks
do_action()called directly
What one call costs · 3 distinct outcomes
One number would be a lie: the work depends on which branch runs. These are every distinct cost register_taxonomy_for_object_type() can have, taken from its control-flow graph on PHP 8.5.
| When | Instructions | Calls it makes |
|---|---|---|
!isset($wp_taxonomies[$taxonomy]) | 6 | none |
isset($wp_taxonomies[$taxonomy]) && !get_post_type_object() | 10 | get_post_type_object() |
isset($wp_taxonomies[$taxonomy]) && get_post_type_object() | 28–32 | get_post_type_object(), array_filter(), do_action() |
Across PHP versions
| PHP | Compiled | Executed | Branches | Notes |
|---|---|---|---|---|
| 8.6-dev | 34 | 6–32 | 3 | |
| 8.5 | 34 | 6–32 | 3 | |
| 8.4 | 34 | 6–32 | 3 | 3 fewer instructions than PHP 8.3 |
| 8.3 | 37 | 6–35 | 3 | |
| 8.2 | 37 | 6–35 | 3 | |
| 8.1 | 37 | 6–35 | 3 | |
| 7.4 | 37 | 6–35 | 3 |
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.
Hooks and filters fired · 1
One hook fires while register_taxonomy_for_object_type() runs, in this order:
- do_action( registered_taxonomy_for_object_type )actionline 794 (+26 into the body)
Fires after a taxonomy is registered for an object type.
Uses · 2
- get_post_type_object()Retrieves a post type object by name.
- do_action()Calls the callback functions that have been added to an action hook.
Used by · 1
- WP_Post_Type::register_taxonomies()Registers the taxonomies for the post type.
Source code
function register_taxonomy_for_object_type( $taxonomy, $object_type ) { global $wp_taxonomies; if ( ! isset( $wp_taxonomies[ $taxonomy ] ) ) { return false; } if ( ! get_post_type_object( $object_type ) ) { return false; } if ( ! in_array( $object_type, $wp_taxonomies[ $taxonomy ]->object_type, true ) ) { $wp_taxonomies[ $taxonomy ]->object_type[] = $object_type; } // Filter out empties. $wp_taxonomies[ $taxonomy ]->object_type = array_filter( $wp_taxonomies[ $taxonomy ]->object_type ); /** * Fires after a taxonomy is registered for an object type. * * @since 5.1.0 * * @param string $taxonomy Taxonomy name. * @param string $object_type Name of the object type. */ do_action( 'registered_taxonomy_for_object_type', $taxonomy, $object_type ); return 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 7.1.0 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.