content_url( string $path = '' ): string
- Since
- 2.6.0
- Source
wp-includes/link-template.php:3651
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
$pathstringoptional- Path relative to the content URL. Default empty.Default:
''
Return value
string- Content URL link with optional path appended.
Performance profile
How much work a call to content_url() does, and what it touches: the algorithmic scaling, the Zend instruction count per call across PHP versions, the hooks it hands control to, and the core code that calls it. Measured from the compiled opcodes, not a stopwatch, so every number is identical on any machine running the same PHP version, and every function in core is ranked by cost.
- Cost class
- Trivial
- Scaling
- Constant
- Instructions
- 13–21
- Plugin surface
- 1 hook
- Called by
- 4
Touches nothing outside its own arguments.
No loop in the body: the same number of instructions runs whatever you pass in.
Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 21.
Third-party callbacks on 'content_url' run inside this call, and their cost is not bounded by anything here.
4 places in core call this, so the cost is paid more often than your own code shows.
What it touches
- hookthird-party callbacks
apply_filters()called directly
What one call costs · 2 distinct outcomes
One number would be a lie: the work depends on which branch runs. These are every distinct cost content_url() can have, taken from its control-flow graph on PHP 8.5.
| When | Instructions | Calls it makes |
|---|---|---|
| always | 13–15 | set_url_scheme(), apply_filters() |
is_string($path) | 21 | set_url_scheme(), ltrim(), apply_filters() |
Across PHP versions
Compiles the same on PHP 7.4, 8.1, 8.2, 8.3, 8.4, 8.5 and 8.6-dev: 21 instructions, 13–21 executed per call, 2 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.
Hooks and filters fired · 1
One hook fires while content_url() runs, in this order:
- apply_filters( content_url )filterline 3667 (+16 into the body)
Filters the URL to the content directory.
Uses · 2
- set_url_scheme()Sets the scheme for a URL.
- apply_filters()Calls the callback functions that have been added to a filter hook.
Used by · 4
- WP_URL_Pattern_Prefixer::get_default_contexts()Returns the default contexts used by the class.
- _WP_Editors::editor_settings()
- _load_script_textdomain_from_src()Resolves and loads the translation JSON file for a given script or script module source URL.
- get_theme_root_uri()Retrieves URI for themes directory.
Source code
function content_url( $path = '' ) { $url = set_url_scheme( WP_CONTENT_URL ); if ( $path && is_string( $path ) ) { $url .= '/' . ltrim( $path, '/' ); } /** * Filters the URL to the content directory. * * @since 2.8.0 * * @param string $url The complete URL to the content directory including scheme and path. * @param string $path Path relative to the URL to the content directory. Blank string * if no path is specified. */ return apply_filters( 'content_url', $url, $path );}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 7.1.0 tag, from
src/wp-includes/link-template.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.