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WordPress

wp_expand_dimensions( int $example_width, int $example_height, int $max_width, int $max_height ): int[]

Since
2.9.0
Source
wp-includes/media.php:4311
Based on a supplied width/height example, returns the biggest possible dimensions based on the max width/height.

Compatibility

WordPress
since 2.9.0
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

$example_widthint
The width of an example embed.
$example_heightint
The height of an example embed.
$max_widthint
The maximum allowed width.
$max_heightint
The maximum allowed height.

Return value

int[]
An array of maximum width and height values.

  • $0int

    The maximum width in pixels.

  • $1int

    The maximum height in pixels.

Performance profile

How much work a call to wp_expand_dimensions() 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
21

Executed per call on PHP 8.5. The body compiles to 21.

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

  • hookthird-party callbacksapply_filters()one call below wp_expand_dimensions()

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

WhenInstructionsCalls it makes
always21wp_constrain_dimensions()

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, 21 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.

Uses · 1

Source code

View on Trac View on GitHub 

function wp_expand_dimensions( $example_width, $example_height, $max_width, $max_height ) {	$example_width  = (int) $example_width;	$example_height = (int) $example_height;	$max_width      = (int) $max_width;	$max_height     = (int) $max_height; 	return wp_constrain_dimensions( $example_width * 1000000, $example_height * 1000000, $max_width, $max_height );}

Changelog

Introduced in 2.9.0. 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-includes/media.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.
Corrections
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