wppaste
WordPress

WP_Theme_JSON::resolve_custom_css_format( array $tree ): array

Since
6.3.0
Source
wp-includes/class-wp-theme-json.php:5598
Given a tree, converts the internal representation of variables to the CSS representation.

Description

It is recursive and modifies the input in-place.

Compatibility

WordPress
since 6.3.0
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

$treearray
Input to process.

Return value

array
The modified $tree.

Performance profile

How much work a call to WP_Theme_JSON::resolve_custom_css_format() 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
4–5

Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 24.

Plugin surface
None

Nothing here hands control to plugin code.

Called by
1

1 place in core call this, so the cost is paid more often than your own code shows.

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

WhenInstructionsCalls it makes
always4–5none

Across PHP versions

PHPCompiledExecutedBranchesNotes
8.6-dev244–55
8.5244–55
8.4244–553 fewer instructions than PHP 8.3
8.3274–55
8.2274–55
8.1274–551 fewer instruction than PHP 7.4
7.4285–65

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

Used by · 1

Source code

View on Trac View on GitHub 

	private static function resolve_custom_css_format( $tree ) {		$prefix = 'var:'; 		foreach ( $tree as $key => $data ) {			if ( is_string( $data ) && str_starts_with( $data, $prefix ) ) {				$tree[ $key ] = self::convert_custom_properties( $data );			} elseif ( is_array( $data ) ) {				$tree[ $key ] = self::resolve_custom_css_format( $data );			}		} 		return $tree;	}

Changelog

Introduced in 6.3.0. 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/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.