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WordPress

WP_Style_Engine::get_individual_property_css_declarations( array $style_value, array $individual_property_definition, array $options = array() ): string[]

Since
6.1.0
Source
wp-includes/style-engine/class-wp-style-engine.php:679
Style value parser that returns a CSS definition array comprising style properties that have keys representing individual style properties, otherwise known as longhand CSS properties.

Description

Example:

"$style_property-$individual_feature: $value;"

Which could represent the following:

"border-{top|right|bottom|left}-{color|width|style}: {value};"

or:

"border-image-{outset|source|width|repeat|slice}: {value};"

Compatibility

WordPress
since 6.1.0
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.

Parameters

$style_valuearray
A single raw style value from $block_styles array.
$individual_property_definitionarray
A single style definition from BLOCK_STYLE_DEFINITIONS_METADATA representing an individual property of a CSS property, e.g. 'top' in 'border-top'.
$optionsarrayoptional
An array of options. Default empty array.Default: array()

  • $convert_vars_to_classnamesbooldefault: false

    Whether to skip converting incoming CSS var patterns, e.g. var:preset|<PRESET_TYPE>|<PRESET_SLUG>, to var( --wp--preset--* ) values.

Return value

string[]
An associative array of CSS definitions, e.g. array( "$property" => "$value", "$property" => "$value" ).

Performance profile

How much work a call to WP_Style_Engine::get_individual_property_css_declarations() 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
Light

Touches nothing outside its own arguments.

Scaling
Scales with input

The body loops, so the work grows with what you pass in.

Instructions
6–23

Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 65.

Plugin surface
None

Nothing here hands control to plugin code.

Called by
0

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_Style_Engine::get_individual_property_css_declarations() can have, taken from its control-flow graph on PHP 8.5.

WhenInstructionsCalls it makes
always6–23none

Across PHP versions

PHPCompiledExecutedBranchesNotes
8.6-dev656–2313
8.5656–2313
8.4656–23133 fewer instructions than PHP 8.3
8.3686–2313
8.2686–2313
8.1686–2313
7.4686–2313

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

  • _wp_array_get()Accesses an array in depth based on a path of keys.
  • str_contains()Polyfill for `str_contains()` function added in PHP 8.0.
  • static::get_css_var_value()

Source code

View on Trac View on GitHub 

	protected static function get_individual_property_css_declarations( $style_value, $individual_property_definition, $options = array() ) {		if ( ! is_array( $style_value ) || empty( $style_value ) || empty( $individual_property_definition['path'] ) ) {			return array();		} 		/*		 * The first item in $individual_property_definition['path'] array		 * tells us the style property, e.g. "border". We use this to get a corresponding		 * CSS style definition such as "color" or "width" from the same group.		 *		 * The second item in $individual_property_definition['path'] array		 * refers to the individual property marker, e.g. "top".		 */		$definition_group_key    = $individual_property_definition['path'][0];		$individual_property_key = $individual_property_definition['path'][1];		$should_skip_css_vars    = isset( $options['convert_vars_to_classnames'] ) && true === $options['convert_vars_to_classnames'];		$css_declarations        = array(); 		foreach ( $style_value as $css_property => $value ) {			if ( empty( $value ) ) {				continue;			} 			// Build a path to the individual rules in definitions.			$style_definition_path = array( $definition_group_key, $css_property );			$style_definition      = _wp_array_get( static::BLOCK_STYLE_DEFINITIONS_METADATA, $style_definition_path, null ); 			if ( $style_definition && isset( $style_definition['property_keys']['individual'] ) ) {				// Set a CSS var if there is a valid preset value.				if ( is_string( $value ) && str_contains( $value, 'var:' )					&& ! $should_skip_css_vars && ! empty( $individual_property_definition['css_vars'] )				) {					$value = static::get_css_var_value( $value, $individual_property_definition['css_vars'] );				} 				$individual_css_property = sprintf( $style_definition['property_keys']['individual'], $individual_property_key ); 				$css_declarations[ $individual_css_property ] = $value;			}		}		return $css_declarations;	}

Changelog

Introduced in 6.1.0. Unchanged from 6.7.7 through 7.1.0.

  1. 6.7.7
  2. 6.8.8
  3. 6.9.7
  4. 7.0.4
  5. 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/style-engine/class-wp-style-engine.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.
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