_wp_delete_all_temp_backups()
- Since
- 6.3.0
- Source
wp-includes/update.php:1149
Compatibility
- WordPress
- since 6.3.0
- 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_delete_all_temp_backups() 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
- 23–44
- Plugin surface
- None
- Called by
- 0
Reads stored settings via get_option(), cached per request but not free on a cold cache.
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 75.
Nothing here hands control to plugin code.
Nothing in core calls this; the cost is only what you spend yourself.
What it touches
- hookthird-party callbacks
apply_filters()one call below _wp_delete_all_temp_backups() - optionoption read or write
get_option()one call below _wp_delete_all_temp_backups()
Further down the call graph this can also reach cache, serialize, transient and query. Those are the worst case, several calls deep and usually down an error path, not what a normal call pays.
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_delete_all_temp_backups() can have, taken from its control-flow graph on PHP 8.5.
| When | Instructions | Calls it makes |
|---|---|---|
$credentials === false | 23–26 | function_exists(), ob_start(), request_filesystem_credentials(), ob_end_clean(), __(), wp_trigger_error() |
$credentials !== false && !WP_Filesystem() | 27–30 | function_exists(), ob_start(), request_filesystem_credentials(), ob_end_clean(), WP_Filesystem(), __(), wp_trigger_error() |
$credentials !== false && WP_Filesystem() && !->wp_content_dir() | 34–37 | function_exists(), ob_start(), request_filesystem_credentials(), ob_end_clean(), WP_Filesystem(), ->wp_content_dir(), __(), sprintf(), wp_trigger_error() |
$credentials !== false && WP_Filesystem() && ->wp_content_dir() | 39–44 | function_exists(), ob_start(), request_filesystem_credentials(), ob_end_clean(), WP_Filesystem(), ->wp_content_dir(), ->wp_content_dir(), ->dirlist(), array_keys() |
Across PHP versions
Compiles the same on PHP 7.4, 8.1, 8.2, 8.3, 8.4, 8.5 and 8.6-dev: 75 instructions, 23–44 executed per call, 9 branches. 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.
Uses · 4
- request_filesystem_credentials()Displays a form to the user to request for their FTP/SSH details in order to connect to the filesystem.
- WP_Filesystem()Initializes and connects the WordPress Filesystem Abstraction classes.
- wp_trigger_error()Generates a user-level error/warning/notice/deprecation message.
- __()Retrieves the translation of $text.
Source code
function _wp_delete_all_temp_backups() { global $wp_filesystem; if ( ! function_exists( 'WP_Filesystem' ) ) { require_once ABSPATH . 'wp-admin/includes/file.php'; } ob_start(); $credentials = request_filesystem_credentials( '' ); ob_end_clean(); if ( false === $credentials || ! WP_Filesystem( $credentials ) ) { wp_trigger_error( __FUNCTION__, __( 'Could not access filesystem.' ) ); return; } if ( ! $wp_filesystem->wp_content_dir() ) { wp_trigger_error( __FUNCTION__, /* translators: %s: Directory name. */ sprintf( __( 'Unable to locate WordPress content directory (%s).' ), 'wp-content' ) ); return; } $temp_backup_dir = $wp_filesystem->wp_content_dir() . 'upgrade-temp-backup/'; $dirlist = $wp_filesystem->dirlist( $temp_backup_dir ); $dirlist = $dirlist ? $dirlist : array(); foreach ( array_keys( $dirlist ) as $dir ) { if ( '.' === $dir || '..' === $dir ) { continue; } $wp_filesystem->delete( $temp_backup_dir . $dir, true ); }}Changelog
Introduced in 6.3.0. 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/update.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.