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WordPress

WP_Block_List::offsetGet( int $offset ): WP_Block|null

Since
5.5.0
Source
wp-includes/class-wp-block-list.php:88
Returns the value by the specified block offset.

Compatibility

WordPress
since 5.5.0
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

$offsetint
Offset of block value to retrieve.

Return value

WP_Block|null
Block value if exists, or null.

Performance profile

How much work a call to WP_Block_List::offsetGet() 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
6–21

Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 21.

Plugin surface
None

Nothing here hands control to plugin code.

Called by
1

1 place in core call this, so the cost is paid more often than your own code shows.

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

WhenInstructionsCalls it makes
always6–21none

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, 6–21 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.

Uses · 1

Used by · 1

Source code

View on Trac View on GitHub 

	#[ReturnTypeWillChange]	public function offsetGet( $offset ) {		$block = $this->blocks[ $offset ]; 		if ( isset( $block ) && is_array( $block ) ) {			$block = new WP_Block( $block, $this->available_context, $this->registry ); 			$this->blocks[ $offset ] = $block;		} 		return $block;	}

Changelog

Introduced in 5.5.0. 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.

6.9.7
Parameter $offset retyped from string to int.verified against source
6.9.7
Return type changed from mixed|null to WP_Block|null.verified against source
5.5.0
Introduced.from the docblock

About this page

Parsed data
Generated from the wordpress-develop 6.9.7 tag, from src/wp-includes/class-wp-block-list.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.
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