WP_Customize_Custom_CSS_Setting::update( string $value ): int|false
- Since
- 4.7.0, 5.9.0
- Source
wp-includes/customize/class-wp-customize-custom-css-setting.php:185
Compatibility
- WordPress
- since 5.9.0
- 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
$valuestring- CSS to update.
Return value
int|false- The post ID or false if the value could not be saved.
Performance profile
How much work a call to WP_Customize_Custom_CSS_Setting::update() 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
- 14–26
- Plugin surface
- None
- Called by
- 0
Reaches the database via WP_Customize_Custom_CSS_Setting::update().
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 27.
Nothing here hands control to plugin code.
Nothing in core calls this; the cost is only what you spend yourself.
What it touches
- sqldatabase query
WP_Customize_Custom_CSS_Setting::update()this function does it - hookthird-party callbacks
apply_filters()one call below WP_Customize_Custom_CSS_Setting::update() - querycontent query
get_post()one call below WP_Customize_Custom_CSS_Setting::update() - optionoption read or write
get_option()one call below WP_Customize_Custom_CSS_Setting::update()
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 · 3 distinct outcomes
One number would be a lie: the work depends on which branch runs. These are every distinct cost WP_Customize_Custom_CSS_Setting::update() can have, taken from its control-flow graph on PHP 8.5.
| When | Instructions | Calls it makes |
|---|---|---|
$r instanceof | 14–15 | stylesheet() |
!($r instanceof) | 21–22 | stylesheet(), ->get_stylesheet() |
!($r instanceof) | 25–26 | stylesheet(), ->get_stylesheet(), set_theme_mod() |
Across PHP versions
Compiles the same on PHP 7.4, 8.1, 8.2, 8.3, 8.4, 8.5 and 8.6-dev: 27 instructions, 14–26 executed per call, 3 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 · 2
- wp_update_custom_css_post()Updates the `custom_css` post for a given theme.
- set_theme_mod()Updates theme modification value for the active theme.
Source code
public function update( $value ) { // Restores the more descriptive, specific name for use within this method. $css = $value; if ( empty( $css ) ) { $css = ''; } $r = wp_update_custom_css_post( $css, array( 'stylesheet' => $this->stylesheet, ) ); if ( $r instanceof WP_Error ) { return false; } $post_id = $r->ID; // Cache post ID in theme mod for performance to avoid additional DB query. if ( $this->manager->get_stylesheet() === $this->stylesheet ) { set_theme_mod( 'custom_css_post_id', $post_id ); } return $post_id; }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.
$css to $value for PHP 8 named parameter support.from the docblockAbout this page
- Parsed data
- Generated from the wordpress-develop 6.8.8 tag, from
src/wp-includes/customize/class-wp-customize-custom-css-setting.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.