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WP_Query::parse_tax_query( array $query_vars )

Since
3.1.0
Source
wp-includes/class-wp-query.php:1166
Parses various taxonomy related query vars.

Description

For BC, this method is not marked as protected. See [28987].

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

$query_varsarray
The query variables. Passed by reference.

Performance profile

How much work a call to WP_Query::parse_tax_query() 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
Light

Touches nothing outside its own arguments.

Scaling
Scales with input

The body loops, so the work grows with what you pass in.

Instructions
54–202

Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 502.

Plugin surface
1 hook

Third-party callbacks on 'parse_tax_query' run inside this call, and their cost is not bounded by anything here.

Called by
2

2 places in core call this, so the cost is paid more often than your own code shows.

What it touches

  • hookthird-party callbacksdo_action()called directly
  • regexregular expression over the whole inputpreg_split()called directly

Further down the call graph this can also reach option, cache, serialize, query 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 · 36 distinct outcomes

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

WhenInstructionsCalls it makes
empty($query_vars) && get_taxonomies()54–58get_taxonomies(), post_tag(), do_action()
get_taxonomies()66–70get_taxonomies(), absint(), post_tag(), do_action()
empty($query_vars) && get_taxonomies()74–77get_taxonomies(), preg_split(), post_tag(), do_action()
get_taxonomies()74–80get_taxonomies(), array_unique(), array_map(), sort(), post_tag(), do_action()
empty($query_vars) && get_taxonomies()85get_taxonomies(), sanitize_term_field(), sort(), post_tag(), do_action()
get_taxonomies()86–89get_taxonomies(), preg_split(), absint(), post_tag(), do_action()
get_taxonomies()86–92get_taxonomies(), absint(), array_unique(), array_map(), sort(), post_tag(), do_action()
get_taxonomies()94–99get_taxonomies(), preg_split(), array_unique(), array_map(), sort(), post_tag(), do_action()
get_taxonomies()95–101get_taxonomies(), array_unique(), array_map(), sort(), array_unique(), array_map(), sort(), post_tag(), do_action()
get_taxonomies()97get_taxonomies(), sanitize_term_field(), sort(), absint(), post_tag(), do_action()
get_taxonomies()105–107get_taxonomies(), sanitize_term_field(), sort(), array_unique(), array_map(), sort(), post_tag(), do_action()
get_taxonomies()106–111get_taxonomies(), preg_split(), absint(), array_unique(), array_map(), sort(), post_tag(), do_action()
24 further outcomes, up to 202 instructions
get_taxonomies()107–113get_taxonomies(), absint(), array_unique(), array_map(), sort(), array_unique(), array_map(), sort(), post_tag(), do_action()
get_taxonomies()115–120get_taxonomies(), preg_split(), array_unique(), array_map(), sort(), array_unique(), array_map(), sort(), post_tag(), do_action()
get_taxonomies()116–122get_taxonomies(), array_unique(), array_map(), sort(), array_unique(), array_map(), sort(), array_unique(), array_map(), sort(), post_tag(), do_action()
get_taxonomies()117–119get_taxonomies(), sanitize_term_field(), sort(), absint(), array_unique(), array_map(), sort(), post_tag(), do_action()
get_taxonomies()126–128get_taxonomies(), sanitize_term_field(), sort(), array_unique(), array_map(), sort(), array_unique(), array_map(), sort(), post_tag(), do_action()
get_taxonomies()127–132get_taxonomies(), preg_split(), absint(), array_unique(), array_map(), sort(), array_unique(), array_map(), sort(), post_tag(), do_action()
get_taxonomies()128–134get_taxonomies(), absint(), array_unique(), array_map(), sort(), array_unique(), array_map(), sort(), array_unique(), array_map(), sort(), post_tag(), do_action()
get_taxonomies()136–141get_taxonomies(), preg_split(), array_unique(), array_map(), sort(), array_unique(), array_map(), sort(), array_unique(), array_map(), sort(), post_tag(), do_action()
get_taxonomies()137–143get_taxonomies(), array_unique(), array_map(), sort(), array_unique(), array_map(), sort(), array_unique(), array_map(), sort(), array_unique(), array_map(), sort(), post_tag(), do_action()
get_taxonomies()138–140get_taxonomies(), sanitize_term_field(), sort(), absint(), array_unique(), array_map(), sort(), array_unique(), array_map(), sort(), post_tag(), do_action()
get_taxonomies()147–149get_taxonomies(), sanitize_term_field(), sort(), array_unique(), array_map(), sort(), array_unique(), array_map(), sort(), array_unique(), array_map(), sort(), post_tag(), do_action()
get_taxonomies()148–153get_taxonomies(), preg_split(), absint(), array_unique(), array_map(), sort(), array_unique(), array_map(), sort(), array_unique(), array_map(), sort(), post_tag(), do_action()
get_taxonomies()149–155get_taxonomies(), absint(), array_unique(), array_map(), sort(), array_unique(), array_map(), sort(), array_unique(), array_map(), sort(), array_unique(), array_map(), sort(), post_tag(), do_action()
get_taxonomies()157–162get_taxonomies(), preg_split(), array_unique(), array_map(), sort(), array_unique(), array_map(), sort(), array_unique(), array_map(), sort(), array_unique(), array_map(), sort(), post_tag(), do_action()
get_taxonomies()159–161get_taxonomies(), sanitize_term_field(), sort(), absint(), array_unique(), array_map(), sort(), array_unique(), array_map(), sort(), array_unique(), array_map(), sort(), post_tag(), do_action()
get_taxonomies()159–163get_taxonomies(), array_unique(), array_map(), sort(), array_unique(), array_map(), sort(), array_unique(), array_map(), sort(), array_unique(), array_map(), sort(), array_unique(), array_map(), sort(), post_tag(), do_action()
get_taxonomies()168–170get_taxonomies(), sanitize_term_field(), sort(), array_unique(), array_map(), sort(), array_unique(), array_map(), sort(), array_unique(), array_map(), sort(), array_unique(), array_map(), sort(), post_tag(), do_action()
get_taxonomies()169–174get_taxonomies(), preg_split(), absint(), array_unique(), array_map(), sort(), array_unique(), array_map(), sort(), array_unique(), array_map(), sort(), array_unique(), array_map(), sort(), post_tag(), do_action()
get_taxonomies()171–175get_taxonomies(), absint(), array_unique(), array_map(), sort(), array_unique(), array_map(), sort(), array_unique(), array_map(), sort(), array_unique(), array_map(), sort(), array_unique(), array_map(), sort(), post_tag(), do_action()
get_taxonomies()179–182get_taxonomies(), preg_split(), array_unique(), array_map(), sort(), array_unique(), array_map(), sort(), array_unique(), array_map(), sort(), array_unique(), array_map(), sort(), array_unique(), array_map(), sort(), post_tag(), do_action()
get_taxonomies()180–182get_taxonomies(), sanitize_term_field(), sort(), absint(), array_unique(), array_map(), sort(), array_unique(), array_map(), sort(), array_unique(), array_map(), sort(), array_unique(), array_map(), sort(), post_tag(), do_action()
get_taxonomies()190get_taxonomies(), sanitize_term_field(), sort(), array_unique(), array_map(), sort(), array_unique(), array_map(), sort(), array_unique(), array_map(), sort(), array_unique(), array_map(), sort(), array_unique(), array_map(), sort(), post_tag(), do_action()
get_taxonomies()191–193get_taxonomies(), preg_split(), absint(), array_unique(), array_map(), sort(), array_unique(), array_map(), sort(), array_unique(), array_map(), sort(), array_unique(), array_map(), sort(), array_unique(), array_map(), sort(), post_tag(), do_action()
get_taxonomies()202get_taxonomies(), sanitize_term_field(), sort(), absint(), array_unique(), array_map(), sort(), array_unique(), array_map(), sort(), array_unique(), array_map(), sort(), array_unique(), array_map(), sort(), array_unique(), array_map(), sort(), post_tag(), do_action()

This body has more branch combinations than are worth enumerating, so the table covers the outcomes found first rather than every one that exists.

Across PHP versions

PHPCompiledExecutedBranchesNotes
8.6-dev50254–20246
8.550254–20246
8.450254–2024621 fewer instructions than PHP 8.3
8.352354–20846
8.252354–20846
8.152354–208461 fewer instruction than PHP 7.4
7.452454–20946

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 WP_Query::parse_tax_query() runs, in this order:

  1. do_action( parse_tax_query )actionline 1410 (+244 into the body)

    Fires after taxonomy-related query vars have been parsed.

Uses · 7

Used by · 2

Source code

View on Trac View on GitHub 

	public function parse_tax_query( &$query_vars ) {		if ( ! empty( $query_vars['tax_query'] ) && is_array( $query_vars['tax_query'] ) ) {			$tax_query = $query_vars['tax_query'];		} else {			$tax_query = array();		} 		if ( ! empty( $query_vars['taxonomy'] ) && ! empty( $query_vars['term'] ) ) {			$tax_query[] = array(				'taxonomy' => $query_vars['taxonomy'],				'terms'    => array( $query_vars['term'] ),				'field'    => 'slug',			);		} 		foreach ( get_taxonomies( array(), 'objects' ) as $taxonomy => $t ) {			if ( 'post_tag' === $taxonomy ) {				continue; // Handled further down in the $query_vars['tag'] block.			} 			if ( $t->query_var && ! empty( $query_vars[ $t->query_var ] ) ) {				$tax_query_defaults = array(					'taxonomy' => $taxonomy,					'field'    => 'slug',				); 				if ( ! empty( $t->rewrite['hierarchical'] ) ) {					$query_vars[ $t->query_var ] = wp_basename( $query_vars[ $t->query_var ] );				} 				$term = $query_vars[ $t->query_var ]; 				if ( ! is_array( $term ) ) {					$term = explode( ',', $term );					$term = array_map( 'trim', $term );				}				sort( $term );				$term = implode( ',', $term ); 				if ( str_contains( $term, '+' ) ) {					$terms = preg_split( '/[+]+/', $term );					foreach ( $terms as $term ) {						$tax_query[] = array_merge(							$tax_query_defaults,							array(								'terms' => array( $term ),							)						);					}				} else {					$tax_query[] = array_merge(						$tax_query_defaults,						array(							'terms' => preg_split( '/[,]+/', $term ),						)					);				}			}		} 		// If query string 'cat' is an array, implode it.		if ( is_array( $query_vars['cat'] ) ) {			$query_vars['cat'] = implode( ',', $query_vars['cat'] );		} 		// Category stuff. 		if ( ! empty( $query_vars['cat'] ) && ! $this->is_singular ) {			$cat_in     = array();			$cat_not_in = array(); 			$cat_array = preg_split( '/[,\s]+/', urldecode( $query_vars['cat'] ) );			$cat_array = array_map( 'intval', $cat_array );			sort( $cat_array );			$query_vars['cat'] = implode( ',', $cat_array ); 			foreach ( $cat_array as $cat ) {				if ( $cat > 0 ) {					$cat_in[] = $cat;				} elseif ( $cat < 0 ) {

Changelog

Introduced in 3.1.0. 2 changes between 6.7.7 and 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.

6.9.7
Parameter $query_vars added.verified against source
6.9.7
Parameter $q removed.verified against source
3.1.0
Introduced.from the docblock

About this page

Parsed data
Generated from the wordpress-develop 6.9.7 tag, from src/wp-includes/class-wp-query.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.
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