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WP_Theme_JSON_Resolver::resolve_theme_file_uris( WP_Theme_JSON $theme_json ): WP_Theme_JSON

Since
6.6.0
Source
wp-includes/class-wp-theme-json-resolver.php:922
Resolves relative paths in theme.json styles to theme absolute paths and merges them with incoming theme JSON.

Compatibility

WordPress
since 6.6.0
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

$theme_jsonWP_Theme_JSON
A theme json instance.

Return value

WP_Theme_JSON
Theme merged with resolved paths, if any found.

Performance profile

How much work a call to WP_Theme_JSON_Resolver::resolve_theme_file_uris() 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
8–17

Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 32.

Plugin surface
None

Nothing here hands control to plugin code.

Called by
2

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

What one call costs · 2 distinct outcomes

One number would be a lie: the work depends on which branch runs. These are every distinct cost WP_Theme_JSON_Resolver::resolve_theme_file_uris() can have, taken from its control-flow graph on PHP 8.5.

WhenInstructionsCalls it makes
empty($resolved_urls)8::get_resolved_theme_uris()
!empty($resolved_urls)16–17::get_resolved_theme_uris(), ->get_raw_data()

Across PHP versions

Compiles the same on PHP 7.4, 8.1, 8.2, 8.3, 8.4, 8.5 and 8.6-dev: 32 instructions, 8–17 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 · 3

Used by · 2

Source code

	public static function resolve_theme_file_uris( $theme_json ) {		$resolved_urls = static::get_resolved_theme_uris( $theme_json );		if ( empty( $resolved_urls ) ) {			return $theme_json;		} 		$resolved_theme_json_data = $theme_json->get_raw_data(); 		foreach ( $resolved_urls as $resolved_url ) {			$path = explode( '.', $resolved_url['target'] );			_wp_array_set( $resolved_theme_json_data, $path, $resolved_url['href'] );		} 		return new WP_Theme_JSON( $resolved_theme_json_data );	}

Changelog

Introduced in 6.6.0. 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-resolver.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.
Corrections
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