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twentyeleven_body_classes( array $classes ): array

Since
Twenty Eleven 1.0
Source
wp-content/themes/twentyeleven/functions.php:883
Adds two classes to the array of body classes.

Description

The first is if the site has only had one author with published posts.
The second is if a singular post being displayed

Compatibility

WordPress
since Twenty Eleven 1.0
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

$classesarray
Existing body classes.

Return value

array
The filtered array of body classes.

Performance profile

How much work a call to twentyeleven_body_classes() 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
Moderate

Reads stored settings via get_transient(), cached per request but not free on a cold cache.

Scaling
Constant

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

Instructions
9–27

Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 27.

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 it touches

  • transienttransientget_transient()one call below twentyeleven_body_classes()
  • hookthird-party callbacksapply_filters()one call below twentyeleven_body_classes()

Further down the call graph this can also reach cache, option, query and serialize. Those are the worst case, several calls deep and usually down an error path, not what a normal call pays.

What one call costs · 8 distinct outcomes

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

WhenInstructionsCalls it makes
!function_exists() && !is_singular()9function_exists(), is_singular()
!function_exists() && is_singular() && is_home()12function_exists(), is_singular(), is_home()
function_exists() && !is_singular()12–14function_exists(), is_multi_author(), is_singular()
function_exists() && is_singular() && is_home()15–17function_exists(), is_multi_author(), is_singular(), is_home()
!function_exists() && is_singular() && !is_home() && is_page_template()16function_exists(), is_singular(), is_home(), is_page_template()
function_exists() && is_singular() && !is_home() && is_page_template()19–21function_exists(), is_multi_author(), is_singular(), is_home(), is_page_template()
!function_exists() && is_singular() && !is_home() && !is_page_template()20–22function_exists(), is_singular(), is_home(), is_page_template(), is_page_template()
function_exists() && is_singular() && !is_home() && !is_page_template()23–27function_exists(), is_multi_author(), is_singular(), is_home(), is_page_template(), is_page_template()

Across PHP versions

Compiles the same on PHP 7.4, 8.1, 8.2, 8.3, 8.4, 8.5 and 8.6-dev: 27 instructions, 9–27 executed per call, 6 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 · 4

  • is_multi_author()Determines whether this site has more than one author.
  • is_singular()Determines whether the query is for an existing single post of any post type (post, attachment, page, custom post types).
  • is_home()Determines whether the query is for the blog homepage.
  • is_page_template()Determines whether the current post uses a page template.

Source code

View on Trac View on GitHub 

function twentyeleven_body_classes( $classes ) { 	if ( function_exists( 'is_multi_author' ) && ! is_multi_author() ) {		$classes[] = 'single-author';	} 	if ( is_singular() && ! is_home() && ! is_page_template( 'showcase.php' ) && ! is_page_template( 'sidebar-page.php' ) ) {		$classes[] = 'singular';	} 	return $classes;}

Changelog

Introduced in Twenty Eleven 1.0. 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-content/themes/twentyeleven/functions.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.
Corrections
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