WP_Site_Health::check_wp_version_check_exists()
- Since
- 5.2.0
- Source
wp-admin/includes/class-wp-site-health.php:234
wp_version_check is blocked.Description
It's possible to block updates with the wp_version_check filter, but this can't be checked during an Ajax call, as the filter is never introduced then.
This filter overrides a standard page request if it's made by an admin through the Ajax call with the right query argument to check for this.
Compatibility
- WordPress
- since 5.2.0
- 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_Site_Health::check_wp_version_check_exists() 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
- Scaling
- Constant
- Instructions
- 4–24
- Plugin surface
- None
- Called by
- 0
Touches nothing outside its own arguments.
No loop in the body: the same number of instructions runs whatever you pass in.
Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 26.
Nothing here hands control to plugin code.
Nothing in core calls this; the cost is only what you spend yourself.
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_Site_Health::check_wp_version_check_exists() can have, taken from its control-flow graph on PHP 8.5.
| When | Instructions | Calls it makes |
|---|---|---|
!is_admin() | 4 | is_admin() |
is_admin() && !is_user_logged_in() | 7 | is_admin(), is_user_logged_in() |
is_admin() && is_user_logged_in() | 11–14 | is_admin(), is_user_logged_in(), current_user_can() |
is_admin() && is_user_logged_in() && current_user_can() && isset($value) | 23–24 | is_admin(), is_user_logged_in(), current_user_can(), has_filter(), exit() |
Across PHP versions
| PHP | Compiled | Executed | Branches | Notes |
|---|---|---|---|---|
| 8.6-dev | 26 | 4–24 | 5 | |
| 8.5 | 26 | 4–24 | 5 | |
| 8.4 | 26 | 4–24 | 5 | 2 more instructions than PHP 8.3 |
| 8.3 | 24 | 4–22 | 5 | |
| 8.2 | 24 | 4–22 | 5 | |
| 8.1 | 24 | 4–22 | 5 | |
| 7.4 | 24 | 4–22 | 5 |
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 · 4
- is_admin()Determines whether the current request is for an administrative interface page.
- is_user_logged_in()Determines whether the current visitor is a logged in user.
- current_user_can()Returns whether the current user has the specified capability.
- has_filter()Checks if any filter has been registered for a hook.
Source code
public function check_wp_version_check_exists() { if ( ! is_admin() || ! is_user_logged_in() || ! current_user_can( 'update_core' ) || ! isset( $_GET['health-check-test-wp_version_check'] ) ) { return; } echo ( has_filter( 'wp_version_check', 'wp_version_check' ) ? 'yes' : 'no' ); die(); }Changelog
Introduced in 5.2.0. 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-admin/includes/class-wp-site-health.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.