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WordPress

WP_MS_Themes_List_Table::_order_callback( WP_Theme $theme_a, WP_Theme $theme_b ): int

Source
wp-admin/includes/class-wp-ms-themes-list-table.php:310
Compares the order of two themes by a specific field.

Compatibility

WordPress
core
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

$theme_aWP_Theme
The first theme to compare.
$theme_bWP_Theme
The second theme to compare.

Return value

int
0 if equal, -1 if the first is less than the second, 1 if more.

Performance profile

How much work a call to WP_MS_Themes_List_Table::_order_callback() 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
10

Executed per call on PHP 8.5. The body compiles to 12.

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 · 1 distinct outcome

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

WhenInstructionsCalls it makes
always10none

Across PHP versions

Compiles the same on PHP 7.4, 8.1, 8.2, 8.3, 8.4, 8.5 and 8.6-dev: 12 instructions, 10 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.

Source code

View on Trac View on GitHub 

	public function _order_callback( $theme_a, $theme_b ) {		global $orderby, $order; 		$a = $theme_a[ $orderby ];		$b = $theme_b[ $orderby ]; 		return 'DESC' === $order ?			$b <=> $a :			$a <=> $b;	}

Changelog

2 changes between 6.7.7 and 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.

7.0.4
Parameter $theme_a retyped from array to WP_Theme.verified against source
7.0.4
Parameter $theme_b retyped from array to WP_Theme.verified against source

About this page

Parsed data
Generated from the wordpress-develop 7.1.0 tag, from src/wp-admin/includes/class-wp-ms-themes-list-table.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.
Corrections
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