WP_Theme_JSON::get_block_style_variation_feature_selector( array $style_variation, string $feature_selector ): string
- Since
- 7.0.0
- Source
wp-includes/class-wp-theme-json.php:5918
Description
Feature selectors can target a different element than the block's root selector. For example, the Button block's root selector targets the inner link, while its dimensions width selector targets the outer wrapper. Apply the variation class directly to the selector that will receive the declarations instead of deriving it by subtracting the root selector from the feature selector.
Compatibility
- WordPress
- since 7.0.0
- PHP
- 7.4–8.6-dev
- 6.7.7
- 6.8.8
- 6.9.7
- 7.0.4
- 7.1.0
Present in 1 of the 5 tracked releases, added in 7.0.0, and compiles on PHP 7.4 through 8.6-dev.
Parameters
$style_variationarray- Style variation metadata.
$feature_selectorstring- CSS selector for the feature.
Return value
string- Feature selector with block style variation selector added.
Performance profile
How much work a call to WP_Theme_JSON::get_block_style_variation_feature_selector() 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
- 6–8
- Plugin surface
- None
- Called by
- 0
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 50.
Nothing here hands control to plugin code.
Nothing in core calls this; the cost is only what you spend yourself.
What one call costs · 1 distinct outcome
One number would be a lie: the work depends on which branch runs. These are every distinct cost WP_Theme_JSON::get_block_style_variation_feature_selector() can have, taken from its control-flow graph on PHP 8.5.
| When | Instructions | Calls it makes |
|---|---|---|
| always | 6–8 | none |
Across PHP versions
| PHP | Compiled | Executed | Branches | Notes |
|---|---|---|---|---|
| 8.6-dev | 49 | 6–8 | 6 | 1 fewer instruction than PHP 8.5 |
| 8.5 | 50 | 6–8 | 6 | |
| 8.4 | 50 | 6–8 | 6 | 9 fewer instructions than PHP 8.3 |
| 8.3 | 59 | 9–14 | 6 | |
| 8.2 | 59 | 9–14 | 6 | |
| 8.1 | 59 | 9–14 | 6 | 15 more instructions than PHP 7.4 |
| 7.4 | 44 | 12–39 | 5 |
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 · 3
- str_starts_with()Polyfill for `str_starts_with()` function added in PHP 8.0.
- static::split_selector_list()
- static::get_block_style_variation_selector()
Source code
protected static function get_block_style_variation_feature_selector( $style_variation, $feature_selector ) { $variation_path = $style_variation['path'] ?? array(); $variation_name = $style_variation['name'] ?? ( is_array( $variation_path ) ? end( $variation_path ) : null ); if ( ! $variation_name ) { return $style_variation['selector'] ?? $feature_selector; } $variation_class = ".is-style-$variation_name"; $selector_parts = static::split_selector_list( $feature_selector ); $selector_parts = array_map( static function ( $selector ) use ( $variation_class ) { $prefix = $variation_class . ' '; if ( str_starts_with( $selector, $prefix ) ) { return substr( $selector, strlen( $prefix ) ); } return $selector; }, $selector_parts ); return static::get_block_style_variation_selector( $variation_name, implode( ', ', $selector_parts ) ); }Changelog
Introduced in 7.0.0.
Signature, return type and hooks compared across 1 parsed release.
About this page
- Parsed data
- Generated from the wordpress-develop 7.1.0 tag, from
src/wp-includes/class-wp-theme-json.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.