wppaste
WordPress

wp_get_term_taxonomy_parent_id( int $term_id, string $taxonomy ): int|false

Since
3.1.0
Source
wp-includes/taxonomy.php:5088
Returns the term's parent's term ID.

Compatibility

WordPress
since 3.1.0
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

$term_idint
Term ID.
$taxonomystring
Taxonomy name.

Return value

int|false
Parent term ID on success, false on failure.

Performance profile

How much work a call to wp_get_term_taxonomy_parent_id() 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

Reaches the database via get_term().

Scaling
Constant

No loop in the body: the same number of instructions runs whatever you pass in.

Instructions
9–15

Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 16.

Plugin surface
None

Nothing here hands control to plugin code.

Called by
0

Nothing in core calls this; the cost is only what you spend yourself.

What it touches

  • querycontent queryget_term()called directly
  • hookthird-party callbacksapply_filters()one call below wp_get_term_taxonomy_parent_id()

Further down the call graph this can also reach option, cache, 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 · 2 distinct outcomes

One number would be a lie: the work depends on which branch runs. These are every distinct cost wp_get_term_taxonomy_parent_id() can have, taken from its control-flow graph on PHP 8.5.

WhenInstructionsCalls it makes
always9get_term()
always13–15get_term(), is_wp_error()

Across PHP versions

Compiles the same on PHP 7.4, 8.1, 8.2, 8.3, 8.4, 8.5 and 8.6-dev: 16 instructions, 9–15 executed per call, 2 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

  • get_term()Gets all term data from database by term ID.
  • is_wp_error()Checks whether the given variable is a WordPress Error.

Source code

View on Trac View on GitHub 

function wp_get_term_taxonomy_parent_id( $term_id, $taxonomy ) {	$term = get_term( $term_id, $taxonomy );	if ( ! $term || is_wp_error( $term ) ) {		return false;	}	return (int) $term->parent;}

Changelog

Introduced in 3.1.0. Unchanged from 6.7.7 through 7.1.0.

  1. 6.7.7
  2. 6.8.8
  3. 6.9.7
  4. 7.0.4
  5. 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
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