wppaste
WordPress

WP_Hook::offsetSet( mixed $offset, mixed $value )

Since
4.7.0
Source
wp-includes/class-wp-hook.php:491
Sets a value at a specified offset.

Compatibility

WordPress
since 4.7.0
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

$offsetmixed
The offset to assign the value to.
$valuemixed
The value to set.

Performance profile

How much work a call to WP_Hook::offsetSet() 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
14–15

Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 18.

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

WhenInstructionsCalls it makes
always14–15array_keys()

Across PHP versions

Compiles the same on PHP 7.4, 8.1, 8.2, 8.3, 8.4, 8.5 and 8.6-dev: 18 instructions, 14–15 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 

	#[ReturnTypeWillChange]	public function offsetSet( $offset, $value ) {		if ( is_null( $offset ) ) {			$this->callbacks[] = $value;		} else {			$this->callbacks[ $offset ] = $value;		} 		$this->priorities = array_keys( $this->callbacks );	}

Changelog

Introduced in 4.7.0. 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.

7.1.0
Parameter $offset retyped from mixed to int|null.verified against source
7.1.0
Parameter $value retyped from mixed to array.verified against source
4.7.0
Introduced.from the docblock

About this page

Parsed data
Generated from the wordpress-develop 6.7.7 tag, from src/wp-includes/class-wp-hook.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.