wppaste
WordPress

_config_wp_siteurl( string $url = '' ): string

Since
2.2.0
Source
wp-includes/functions.php:4728
Retrieves the WordPress site URL.

Description

If the constant named 'WP_SITEURL' is defined, then the value in that constant will always be returned. This can be used for debugging a site on your localhost while not having to change the database to your URL.

Compatibility

WordPress
since 2.2.0
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

$urlstringoptional
URL to set the WordPress site location.Default: ''

Return value

string
The WordPress site URL.

Performance profile

How much work a call to _config_wp_siteurl() 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

Touches nothing outside its own arguments.

Scaling
Constant

No loop in the body: the same number of instructions runs whatever you pass in.

Instructions
4–8

Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 9.

Plugin surface
None

Nothing here hands control to plugin code.

Called by
0

Nothing in core calls this; the cost is only what you spend yourself.

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

WhenInstructionsCalls it makes
!defined('WP_SITEURL')4none
defined('WP_SITEURL')8untrailingslashit()

Across PHP versions

Compiles the same on PHP 7.4, 8.1, 8.2, 8.3, 8.4, 8.5 and 8.6-dev: 9 instructions, 4–8 executed per call, 1 branch. 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 · 1

Source code

View on Trac View on GitHub 

function _config_wp_siteurl( $url = '' ) {	if ( defined( 'WP_SITEURL' ) ) {		return untrailingslashit( WP_SITEURL );	}	return $url;}

Changelog

Introduced in 2.2.0. 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 6.8.8 tag, from src/wp-includes/functions.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.
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