wp_get_custom_css_post( string $stylesheet = '' ): WP_Post|null
- Since
- 4.7.0
- Source
wp-includes/theme.php:1979
custom_css post for a given theme.Compatibility
- WordPress
- since 4.7.0
- 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.
Parameters
$stylesheetstringoptional- A theme object stylesheet name. Defaults to the active theme.Default:
''
Return value
WP_Post|null- The custom_css post or null if none exists.
Performance profile
How much work a call to wp_get_custom_css_post() does, and what it touches: the algorithmic scaling, the Zend instruction count per call across PHP versions, the hooks it hands control to, and the core code that calls it. Measured from the compiled opcodes, not a stopwatch, so every number is identical on any machine running the same PHP version, and every function in core is ranked by cost.
- Cost class
- Heavy
- Scaling
- Constant
- Instructions
- 29–57
- Plugin surface
- None
- Called by
- 3
Reaches the database via get_post().
No loop in the body: the same number of instructions runs whatever you pass in.
Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 64.
Nothing here hands control to plugin code.
3 places in core call this, so the cost is paid more often than your own code shows.
What it touches
- querycontent query
get_post()called directly - hookthird-party callbacks
apply_filters()one call below wp_get_custom_css_post() - optionoption read or write
get_option()one call below wp_get_custom_css_post()
Further down the call graph this can also reach cache, serialize and transient. Those are the worst case, several calls deep and usually down an error path, not what a normal call pays.
What one call costs · 14 distinct outcomes
One number would be a lie: the work depends on which branch runs. These are every distinct cost wp_get_custom_css_post() can have, taken from its control-flow graph on PHP 8.5.
| When | Instructions | Calls it makes |
|---|---|---|
!empty($stylesheet) && $stylesheet !== false | 29 | get_post_stati(), sanitize_title(), get_stylesheet() |
!empty($stylesheet) && $stylesheet === false && !$post_id | 31–33 | get_post_stati(), sanitize_title(), get_stylesheet(), get_theme_mod() |
empty($stylesheet) && $stylesheet !== false | 32 | get_stylesheet(), get_post_stati(), sanitize_title(), get_stylesheet() |
empty($stylesheet) && $stylesheet === false && !$post_id | 34–36 | get_stylesheet(), get_post_stati(), sanitize_title(), get_stylesheet(), get_theme_mod() |
!empty($stylesheet) && $stylesheet === false && $post_id && !get_post() | 35–37 | get_post_stati(), sanitize_title(), get_stylesheet(), get_theme_mod(), get_post() |
empty($stylesheet) && $stylesheet === false && $post_id && !get_post() | 38–40 | get_stylesheet(), get_post_stati(), sanitize_title(), get_stylesheet(), get_theme_mod(), get_post() |
!empty($stylesheet) && $stylesheet === false && $post_id && get_post() | 39–41 | get_post_stati(), sanitize_title(), get_stylesheet(), get_theme_mod(), get_post(), get_post() |
empty($stylesheet) && $stylesheet === false && $post_id && get_post() | 42–44 | get_stylesheet(), get_post_stati(), sanitize_title(), get_stylesheet(), get_theme_mod(), get_post(), get_post() |
!empty($stylesheet) && $stylesheet === false && !$post_id && $post_id !== -1 | 45–46 | get_post_stati(), sanitize_title(), get_stylesheet(), get_theme_mod(), custom_css(), set_theme_mod() |
empty($stylesheet) && $stylesheet === false && !$post_id && $post_id !== -1 | 48–49 | get_stylesheet(), get_post_stati(), sanitize_title(), get_stylesheet(), get_theme_mod(), custom_css(), set_theme_mod() |
!empty($stylesheet) && $stylesheet === false && $post_id && !get_post() && $post_id !== -1 | 49–50 | get_post_stati(), sanitize_title(), get_stylesheet(), get_theme_mod(), get_post(), custom_css(), set_theme_mod() |
empty($stylesheet) && $stylesheet === false && $post_id && !get_post() && $post_id !== -1 | 52–53 | get_stylesheet(), get_post_stati(), sanitize_title(), get_stylesheet(), get_theme_mod(), get_post(), custom_css(), set_theme_mod() |
2 further outcomes, up to 57 instructions
!empty($stylesheet) && $stylesheet === false && $post_id && get_post() && $post_id !== -1 | 53–54 | get_post_stati(), sanitize_title(), get_stylesheet(), get_theme_mod(), get_post(), get_post(), custom_css(), set_theme_mod() |
empty($stylesheet) && $stylesheet === false && $post_id && get_post() && $post_id !== -1 | 56–57 | get_stylesheet(), get_post_stati(), sanitize_title(), get_stylesheet(), get_theme_mod(), get_post(), get_post(), custom_css(), set_theme_mod() |
Across PHP versions
| PHP | Compiled | Executed | Branches | Notes |
|---|---|---|---|---|
| 8.6-dev | 64 | 29–57 | 7 | |
| 8.5 | 64 | 29–57 | 7 | |
| 8.4 | 64 | 29–57 | 7 | |
| 8.3 | 64 | 29–57 | 7 | |
| 8.2 | 64 | 29–57 | 7 | |
| 8.1 | 64 | 29–57 | 7 | 1 fewer instruction than PHP 7.4 |
| 7.4 | 65 | 29–58 | 7 |
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 · 7
- get_stylesheet()Retrieves name of the current stylesheet.
- get_post_stati()Gets a list of post statuses.
- sanitize_title()Sanitizes a string into a slug, which can be used in URLs or HTML attributes.
- get_theme_mod()Retrieves theme modification value for the active theme.
- get_post()Retrieves post data given a post ID or post object.
- set_theme_mod()Updates theme modification value for the active theme.
- WP_Query::__construct()Constructor.
Used by · 3
- WP_Customize_Custom_CSS_Setting::value()Fetch the value of the setting. Will return the previewed value when `preview()` is called.
- wp_get_custom_css()Fetches the saved Custom CSS content for rendering.
- wp_update_custom_css_post()Updates the `custom_css` post for a given theme.
Source code
function wp_get_custom_css_post( $stylesheet = '' ) { if ( empty( $stylesheet ) ) { $stylesheet = get_stylesheet(); } $custom_css_query_vars = array( 'post_type' => 'custom_css', 'post_status' => get_post_stati(), 'name' => sanitize_title( $stylesheet ), 'posts_per_page' => 1, 'no_found_rows' => true, 'cache_results' => true, 'update_post_meta_cache' => false, 'update_post_term_cache' => false, 'lazy_load_term_meta' => false, ); $post = null; if ( get_stylesheet() === $stylesheet ) { $post_id = get_theme_mod( 'custom_css_post_id' ); if ( $post_id > 0 && get_post( $post_id ) ) { $post = get_post( $post_id ); } // `-1` indicates no post exists; no query necessary. if ( ! $post && -1 !== $post_id ) { $query = new WP_Query( $custom_css_query_vars ); $post = $query->post; /* * Cache the lookup. See wp_update_custom_css_post(). * @todo This should get cleared if a custom_css post is added/removed. */ set_theme_mod( 'custom_css_post_id', $post ? $post->ID : -1 ); } } else { $query = new WP_Query( $custom_css_query_vars ); $post = $query->post; } return $post;}Changelog
Introduced in 4.7.0. 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-includes/theme.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.