wppaste
WordPress

wp_reset_query()

Since
2.3.0
Source
wp-includes/query.php:114
Destroys the previous query and sets up a new query.

Description

This should be used after query_posts() and before another query_posts().
This will remove obscure bugs that occur when the previous WP_Query object is not destroyed properly before another is set up.

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.

Performance profile

How much work a call to wp_reset_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
Trivial

Touches nothing outside its own arguments.

Scaling
Constant

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

Instructions
6

Executed per call on PHP 8.5. The body compiles to 6.

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 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_reset_query() can have, taken from its control-flow graph on PHP 8.5.

WhenInstructionsCalls it makes
always6wp_reset_postdata()

Across PHP versions

PHPCompiledExecutedBranchesNotes
8.6-dev660
8.5660
8.4660
8.3660
8.2660
8.16602 fewer instructions than PHP 7.4
7.4880

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

  • wp_reset_postdata()After looping through a separate query, this function restores the $post global to the current post in the main query.

Source code

View on Trac View on GitHub 

function wp_reset_query() {	$GLOBALS['wp_query'] = $GLOBALS['wp_the_query'];	wp_reset_postdata();}

Changelog

Introduced in 2.3.0. 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 6.8.8 tag, from src/wp-includes/query.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.
Corrections
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