wp_delete_object_term_relationships( int $object_id, string|array $taxonomies )
- Since
- 2.3.0
- Source
wp-includes/taxonomy.php:1987
Description
Will remove all relationships between the object and any terms in a particular taxonomy or taxonomies. Does not remove the term or taxonomy itself.
Compatibility
- WordPress
- since 2.3.0
- 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_idint- The term object ID that refers to the term.
$taxonomiesstring|array- List of taxonomy names or single taxonomy name.
Performance profile
How much work a call to wp_delete_object_term_relationships() 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
- Heavy
- Scaling
- Scales with input
- Instructions
- 10–13
- Plugin surface
- None
- Called by
- 3
Reaches the database via wp_get_object_terms().
The body loops, so the work grows with what you pass in.
Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 30.
Nothing here hands control to plugin code.
3 places in core call this, so the cost is paid more often than your own code shows.
What it touches
- querycontent query
wp_get_object_terms()called directly - hookthird-party callbacks
apply_filters()one call below wp_delete_object_term_relationships() - cacheobject cache
wp_cache_delete()one call below wp_delete_object_term_relationships()
Further down the call graph this can also reach option, serialize and transient. Those are the worst case, several calls deep and usually down an error path, not what a normal call pays.
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 wp_delete_object_term_relationships() can have, taken from its control-flow graph on PHP 8.5.
| When | Instructions | Calls it makes |
|---|---|---|
| always | 10–13 | none |
Across PHP versions
Compiles the same on PHP 7.4, 8.1, 8.2, 8.3, 8.4, 8.5 and 8.6-dev: 30 instructions, 10–13 executed per call, 3 branches. The work does not change between versions.
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 · 2
- wp_get_object_terms()Retrieves the terms associated with the given object(s), in the supplied taxonomies.
- wp_remove_object_terms()Removes term(s) associated with a given object.
Used by · 3
- wp_delete_attachment()Trashes or deletes an attachment.
- wp_delete_link()Deletes a specified link from the database.
- wp_delete_post()Trashes or deletes a post or page.
Source code
function wp_delete_object_term_relationships( $object_id, $taxonomies ) { $object_id = (int) $object_id; if ( ! is_array( $taxonomies ) ) { $taxonomies = array( $taxonomies ); } foreach ( (array) $taxonomies as $taxonomy ) { $term_ids = wp_get_object_terms( $object_id, $taxonomy, array( 'fields' => 'ids' ) ); $term_ids = array_map( 'intval', $term_ids ); wp_remove_object_terms( $object_id, $term_ids, $taxonomy ); }}Changelog
Introduced in 2.3.0. 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.