wp_clear_auth_cookie()
- Since
- 2.5.0
- Source
wp-includes/pluggable.php:1208
Compatibility
- WordPress
- since 2.5.0
- 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_clear_auth_cookie() 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
- 14–253
- Plugin surface
- 2 hooks
- Called by
- 3
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 254.
Third-party callbacks on 'clear_auth_cookie', 'send_auth_cookies' run inside this call, and their cost is not bounded by anything here.
3 places in core call this, so the cost is paid more often than your own code shows.
What it touches
- hookthird-party callbacks
do_action()called directly
Further down the call graph this can also reach query. That is 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_clear_auth_cookie() can have, taken from its control-flow graph on PHP 8.5.
| When | Instructions | Calls it makes |
|---|---|---|
!apply_filters() | 14 | do_action(), apply_filters() |
apply_filters() | 253 | do_action(), apply_filters(), time(), setcookie(), time(), setcookie(), time(), setcookie(), time(), setcookie(), time(), setcookie(), time(), setcookie(), get_current_user_id(), time(), setcookie(), get_current_user_id(), time(), setcookie(), time(), setcookie(), time(), setcookie(), time(), setcookie(), time(), setcookie(), time(), setcookie(), time(), setcookie(), time(), setcookie(), time(), setcookie(), time(), setcookie() |
Across PHP versions
Compiles the same on PHP 7.4, 8.1, 8.2, 8.3, 8.4, 8.5 and 8.6-dev: 254 instructions, 14–253 executed per call, 1 branch. 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.
Hooks and filters fired · 2
2 hooks fire while wp_clear_auth_cookie() runs, in this order:
- do_action( clear_auth_cookie )actionline 1214 (+6 into the body)
Fires just before the authentication cookies are cleared.
- apply_filters( send_auth_cookies )filterline 1217 (+9 into the body)
Allows preventing auth cookies from actually being sent to the client.
Uses · 3
- do_action()Calls the callback functions that have been added to an action hook.
- apply_filters()Calls the callback functions that have been added to a filter hook.
- get_current_user_id()Gets the current user's ID.
Used by · 3
- wp_clearcookie()Clears the authentication cookie, logging the user out. This function is deprecated.
- wp_logout()Logs the current user out.
- wp_update_user()Updates a user in the database.
Source code
function wp_clear_auth_cookie() { /** * Fires just before the authentication cookies are cleared. * * @since 2.7.0 */ do_action( 'clear_auth_cookie' ); /** This filter is documented in wp-includes/pluggable.php */ if ( ! apply_filters( 'send_auth_cookies', true, 0, 0, 0, '', '' ) ) { return; } // Auth cookies. setcookie( AUTH_COOKIE, ' ', time() - YEAR_IN_SECONDS, ADMIN_COOKIE_PATH, COOKIE_DOMAIN ); setcookie( SECURE_AUTH_COOKIE, ' ', time() - YEAR_IN_SECONDS, ADMIN_COOKIE_PATH, COOKIE_DOMAIN ); setcookie( AUTH_COOKIE, ' ', time() - YEAR_IN_SECONDS, PLUGINS_COOKIE_PATH, COOKIE_DOMAIN ); setcookie( SECURE_AUTH_COOKIE, ' ', time() - YEAR_IN_SECONDS, PLUGINS_COOKIE_PATH, COOKIE_DOMAIN ); setcookie( LOGGED_IN_COOKIE, ' ', time() - YEAR_IN_SECONDS, COOKIEPATH, COOKIE_DOMAIN ); setcookie( LOGGED_IN_COOKIE, ' ', time() - YEAR_IN_SECONDS, SITECOOKIEPATH, COOKIE_DOMAIN ); // Settings cookies. setcookie( 'wp-settings-' . get_current_user_id(), ' ', time() - YEAR_IN_SECONDS, SITECOOKIEPATH ); setcookie( 'wp-settings-time-' . get_current_user_id(), ' ', time() - YEAR_IN_SECONDS, SITECOOKIEPATH ); // Old cookies. setcookie( AUTH_COOKIE, ' ', time() - YEAR_IN_SECONDS, COOKIEPATH, COOKIE_DOMAIN ); setcookie( AUTH_COOKIE, ' ', time() - YEAR_IN_SECONDS, SITECOOKIEPATH, COOKIE_DOMAIN ); setcookie( SECURE_AUTH_COOKIE, ' ', time() - YEAR_IN_SECONDS, COOKIEPATH, COOKIE_DOMAIN ); setcookie( SECURE_AUTH_COOKIE, ' ', time() - YEAR_IN_SECONDS, SITECOOKIEPATH, COOKIE_DOMAIN ); // Even older cookies. setcookie( USER_COOKIE, ' ', time() - YEAR_IN_SECONDS, COOKIEPATH, COOKIE_DOMAIN ); setcookie( PASS_COOKIE, ' ', time() - YEAR_IN_SECONDS, COOKIEPATH, COOKIE_DOMAIN ); setcookie( USER_COOKIE, ' ', time() - YEAR_IN_SECONDS, SITECOOKIEPATH, COOKIE_DOMAIN ); setcookie( PASS_COOKIE, ' ', time() - YEAR_IN_SECONDS, SITECOOKIEPATH, COOKIE_DOMAIN ); // Post password cookie. setcookie( 'wp-postpass_' . COOKIEHASH, ' ', time() - YEAR_IN_SECONDS, COOKIEPATH, COOKIE_DOMAIN ); }Changelog
Introduced in 2.5.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
About this page
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