WP::register_globals()
- Since
- 2.0.0
- Source
wp-includes/class-wp.php:662
Description
The query_vars property will be extracted to the GLOBALS. So care should be taken when naming global variables that might interfere with the WordPress environment.
Compatibility
- WordPress
- since 2.0.0
- 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.
Performance profile
How much work a call to WP::register_globals() 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
- 29–42
- Plugin surface
- None
- Called by
- 1
Reaches the database via get_user_by().
The body loops, so the work grows with how much data it finds.
Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 46.
Nothing here hands control to plugin code.
1 place in core call this, so the cost is paid more often than your own code shows.
What it touches
- querycontent query
get_user_by()one call below WP::register_globals()
What one call costs · 4 distinct outcomes
One number would be a lie: the work depends on which branch runs. These are every distinct cost WP::register_globals() can have, taken from its control-flow graph on PHP 8.5.
| When | Instructions | Calls it makes |
|---|---|---|
!->is_single() && !->is_author() | 29–35 | ->is_single(), ->is_page(), ->is_author() |
->is_single() && !->is_author() | 30–32 | ->is_single(), ->is_author() |
!->is_single() && ->is_author() | 36–42 | ->is_single(), ->is_page(), ->is_author(), get_queried_object_id(), get_userdata() |
->is_single() && ->is_author() | 37–39 | ->is_single(), ->is_author(), get_queried_object_id(), get_userdata() |
Across PHP versions
| PHP | Compiled | Executed | Branches | Notes |
|---|---|---|---|---|
| 8.6-dev | 46 | 29–42 | 6 | |
| 8.5 | 46 | 29–42 | 6 | |
| 8.4 | 46 | 29–42 | 6 | |
| 8.3 | 46 | 29–42 | 6 | |
| 8.2 | 46 | 29–42 | 6 | |
| 8.1 | 46 | 29–42 | 6 | 8 fewer instructions than PHP 7.4 |
| 7.4 | 54 | 33–49 | 6 |
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_userdata()Retrieves user info by user ID.
- get_queried_object_id()Retrieves the ID of the currently queried object.
Used by · 1
- WP::main()Sets up all of the variables required by the WordPress environment.
Source code
public function register_globals() { global $wp_query; // Extract updated query vars back into global namespace. foreach ( (array) $wp_query->query_vars as $key => $value ) { $GLOBALS[ $key ] = $value; } $GLOBALS['query_string'] = $this->query_string; $GLOBALS['posts'] = & $wp_query->posts; $GLOBALS['post'] = $wp_query->post ?? null; $GLOBALS['request'] = $wp_query->request; if ( $wp_query->is_single() || $wp_query->is_page() ) { $GLOBALS['more'] = 1; $GLOBALS['single'] = 1; } if ( $wp_query->is_author() ) { $GLOBALS['authordata'] = get_userdata( get_queried_object_id() ); } }Changelog
Introduced in 2.0.0. 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/class-wp.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.