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WordPress

WP_Widget::update( array $new_instance, array $old_instance ): array

Since
2.8.0
Source
wp-includes/class-wp-widget.php:131
Updates a particular instance of a widget.

Description

This function should check that $new_instance is set correctly. The newly-calculated value of $instance should be returned. If false is returned, the instance won't be saved/updated.

Compatibility

WordPress
since 2.8.0
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

$new_instancearray
New settings for this instance as input by the user via WP_Widget::form().
$old_instancearray
Old settings for this instance.

Return value

array
Settings to save or bool false to cancel saving.

Performance profile

How much work a call to WP_Widget::update() 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

Reaches the database via WP_Widget::update().

Scaling
Constant

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

Instructions
3

Executed per call on PHP 8.5. The body compiles to 3.

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 it touches

  • sqldatabase queryWP_Widget::update()this function does it

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

WhenInstructionsCalls it makes
always3none

Across PHP versions

Compiles the same on PHP 7.4, 8.1, 8.2, 8.3, 8.4, 8.5 and 8.6-dev: 3 instructions, 3 executed per call, 0 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.

Used by · 1

Source code

View on Trac View on GitHub 

	public function update( $new_instance, $old_instance ) {		return $new_instance;	}

Changelog

Introduced in 2.8.0. 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 6.9.7 tag, from src/wp-includes/class-wp-widget.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.
Corrections
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