WP_Font_Face_Resolver::to_theme_file_uri( array $src ): array
- Since
- 6.4.0
- Source
wp-includes/fonts/class-wp-font-face-resolver.php:170
Description
The 'file:./' is specified in the theme's theme.json as a placeholder to be replaced with the URI to the font file's location in the theme. When a "src" beings with this placeholder, it is replaced, converting the src into a URI.
Compatibility
- WordPress
- since 6.4.0
- 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
$srcarray- An array of font file sources to process.
Return value
array- An array of font file src URI(s).
Performance profile
How much work a call to WP_Font_Face_Resolver::to_theme_file_uri() 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
- Scaling
- Scales with input
- Instructions
- 4–5
- Plugin surface
- None
- Called by
- 0
Touches nothing outside its own arguments.
The body loops, so the work grows with what you pass in.
Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 17.
Nothing here hands control to plugin code.
Nothing in core calls this; the cost is only what you spend yourself.
What it touches
- hookthird-party callbacks
apply_filters()one call below WP_Font_Face_Resolver::to_theme_file_uri()
Further down the call graph this can also reach option, cache, serialize, transient and query. Those are the worst case, several calls deep and usually down an error path, not what a normal call pays.
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_Font_Face_Resolver::to_theme_file_uri() can have, taken from its control-flow graph on PHP 8.5.
| When | Instructions | Calls it makes |
|---|---|---|
| always | 4–5 | none |
Across PHP versions
| PHP | Compiled | Executed | Branches | Notes |
|---|---|---|---|---|
| 8.6-dev | 17 | 4–5 | 3 | |
| 8.5 | 17 | 4–5 | 3 | |
| 8.4 | 17 | 4–5 | 3 | 6 fewer instructions than PHP 8.3 |
| 8.3 | 23 | 4–5 | 3 | |
| 8.2 | 23 | 4–5 | 3 | |
| 8.1 | 23 | 4–5 | 3 | 1 fewer instruction than PHP 7.4 |
| 7.4 | 24 | 5–6 | 3 |
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
- str_starts_with()Polyfill for `str_starts_with()` function added in PHP 8.0.
- get_theme_file_uri()Retrieves the URL of a file in the theme.
Source code
private static function to_theme_file_uri( array $src ) { $placeholder = 'file:./'; foreach ( $src as $src_key => $src_url ) { // Skip if the src doesn't start with the placeholder, as there's nothing to replace. if ( ! str_starts_with( $src_url, $placeholder ) ) { continue; } $src_file = str_replace( $placeholder, '', $src_url ); $src[ $src_key ] = get_theme_file_uri( $src_file ); } return $src; }Changelog
Introduced in 6.4.0. Unchanged from 6.7.7 through 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/fonts/class-wp-font-face-resolver.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.