wp_get_active_and_valid_themes(): string[]
- Since
- 5.1.0
- Source
wp-includes/load.php:1067
Description
While upgrading or installing WordPress, no themes are returned.
Compatibility
- WordPress
- since 5.1.0
- 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.
Return value
string[]- Array of absolute paths to theme directories.
Performance profile
How much work a call to wp_get_active_and_valid_themes() 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
- 10–30
- Plugin surface
- None
- Called by
- 1
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 31.
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 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_get_active_and_valid_themes() can have, taken from its control-flow graph on PHP 8.5.
| When | Instructions | Calls it makes |
|---|---|---|
wp_installing() && $pagenow !== "wp-activate.php" | 10 | wp_installing() |
!wp_is_recovery_mode() | 16–20 | wp_installing(), is_child_theme(), wp_is_recovery_mode() |
wp_is_recovery_mode() && !empty($themes) | 22–26 | wp_installing(), is_child_theme(), wp_is_recovery_mode(), wp_skip_paused_themes() |
wp_is_recovery_mode() && empty($themes) | 26–30 | wp_installing(), is_child_theme(), wp_is_recovery_mode(), wp_skip_paused_themes(), add_filter() |
Across PHP versions
Compiles the same on PHP 7.4, 8.1, 8.2, 8.3, 8.4, 8.5 and 8.6-dev: 31 instructions, 10–30 executed per call, 5 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 · 5
- wp_installing()Checks or sets whether WordPress is in "installation" mode.
- is_child_theme()Whether a child theme is in use.
- wp_is_recovery_mode()Determines whether WordPress is in Recovery Mode.
- wp_skip_paused_themes()Filters a given list of themes, removing any paused themes from it.
- add_filter()Adds a callback function to a filter hook.
Used by · 1
- _register_theme_block_patterns()Register any patterns that the active theme may provide under its `./patterns/` directory.
Source code
function wp_get_active_and_valid_themes() { global $pagenow, $wp_stylesheet_path, $wp_template_path; $themes = array(); if ( wp_installing() && 'wp-activate.php' !== $pagenow ) { return $themes; } if ( is_child_theme() ) { $themes[] = $wp_stylesheet_path; } $themes[] = $wp_template_path; /* * Remove themes from the list of active themes when we're on an endpoint * that should be protected against WSODs and the theme is paused. */ if ( wp_is_recovery_mode() ) { $themes = wp_skip_paused_themes( $themes ); // If no active and valid themes exist, skip loading themes. if ( empty( $themes ) ) { add_filter( 'wp_using_themes', '__return_false' ); } } return $themes;}Changelog
Introduced in 5.1.0. 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 6.7.7 tag, from
src/wp-includes/load.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.