wp_style_loader_src( string $src, string $handle ): string|false
- Since
- 2.6.0
- Source
wp-includes/script-loader.php:2079
Description
If installing the 'wp-admin/' directory will be replaced with './'.
The $_wp_admin_css_colors global manages the Administration Screens CSS stylesheet that is loaded. The option that is set is 'admin_color' and is the color and key for the array. The value for the color key is an object with a 'url' parameter that has the URL path to the CSS file.
The query from $src parameter will be appended to the URL that is given from the $_wp_admin_css_colors array value URL.
Compatibility
- WordPress
- since 2.6.0
- 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
$srcstring- Source URL.
$handlestring- Either 'colors' or 'colors-rtl'.
Return value
string|false- URL path to CSS stylesheet for Administration Screens.
Performance profile
How much work a call to wp_style_loader_src() 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
- 9–41
- 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 46.
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_style_loader_src()
Further down the call graph this can also reach query, option, cache, serialize and transient. Those are the worst case, several calls deep and usually down an error path, not what a normal call pays.
What one call costs · 4 distinct outcomes
One number would be a lie: the work depends on which branch runs. These are every distinct cost wp_style_loader_src() can have, taken from its control-flow graph on PHP 8.5.
| When | Instructions | Calls it makes |
|---|---|---|
| always | 9 | wp_installing() |
!wp_installing() && $handle === "colors" && !$color | 20–22 | wp_installing(), get_user_option() |
!wp_installing() && $handle === "colors" && $color | 26–30 | wp_installing(), get_user_option(), parse_url() |
!wp_installing() && $handle === "colors" && $color && isset($parsed) && $parsed | 39–41 | wp_installing(), get_user_option(), parse_url(), wp_parse_str(), add_query_arg() |
Across PHP versions
| PHP | Compiled | Executed | Branches | Notes |
|---|---|---|---|---|
| 8.6-dev | 46 | 9–41 | 7 | |
| 8.5 | 46 | 9–41 | 7 | |
| 8.4 | 46 | 9–41 | 7 | 3 fewer instructions than PHP 8.3 |
| 8.3 | 49 | 9–41 | 7 | |
| 8.2 | 49 | 9–41 | 7 | |
| 8.1 | 49 | 9–41 | 7 | |
| 7.4 | 49 | 9–41 | 7 |
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 · 4
- wp_installing()Checks or sets whether WordPress is in "installation" mode.
- get_user_option()Retrieves user option that can be either per Site or per Network.
- wp_parse_str()Parses a string into variables to be stored in an array.
- add_query_arg()Retrieves a modified URL query string.
Source code
function wp_style_loader_src( $src, $handle ) { global $_wp_admin_css_colors; if ( wp_installing() ) { return preg_replace( '#^wp-admin/#', './', $src ); } if ( 'colors' === $handle ) { $color = get_user_option( 'admin_color' ); if ( empty( $color ) || ! isset( $_wp_admin_css_colors[ $color ] ) ) { $color = 'fresh'; } $color = $_wp_admin_css_colors[ $color ]; $url = $color->url; if ( ! $url ) { return false; } $parsed = parse_url( $src ); if ( isset( $parsed['query'] ) && $parsed['query'] ) { wp_parse_str( $parsed['query'], $qv ); $url = add_query_arg( $qv, $url ); } return $url; } return $src;}Changelog
Introduced in 2.6.0. 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 6.9.7 tag, from
src/wp-includes/script-loader.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.