set_post_thumbnail_size( int $width = 0, int $height = 0, bool|array $crop = false )
- Since
- 2.9.0
- Source
wp-includes/media.php:362
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
$widthintoptional- Image width in pixels.Default:
0 $heightintoptional- Image height in pixels.Default:
0 $cropbool|arrayoptional- Image cropping behavior. If false, the image will be scaled (default). If true, image will be cropped to the specified dimensions using center positions. If an array, the image will be cropped using the array to specify the crop location: @type string $0 The x crop position. Accepts 'left', 'center', or 'right'.Default:
false$1stringThe y crop position. Accepts 'top', 'center', or 'bottom'.
Performance profile
How much work a call to set_post_thumbnail_size() 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
- Scaling
- Constant
- Instructions
- 10
- Plugin surface
- None
- Called by
- 10
Touches nothing outside its own arguments.
No loop in the body: the same number of instructions runs whatever you pass in.
Executed per call on PHP 8.5. The body compiles to 10.
Nothing here hands control to plugin code.
10 places 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 set_post_thumbnail_size() can have, taken from its control-flow graph on PHP 8.5.
| When | Instructions | Calls it makes |
|---|---|---|
| always | 10 | add_image_size() |
Across PHP versions
Compiles the same on PHP 7.4, 8.1, 8.2, 8.3, 8.4, 8.5 and 8.6-dev: 10 instructions, 10 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
- add_image_size()Registers a new image size.
Used by · 10
- twenty_twenty_one_setup()Sets up theme defaults and registers support for various WordPress features.
- twentyeleven_setup()Sets up theme defaults and registers support for various WordPress features.
- twentyfifteen_setup()Sets up theme defaults and registers support for various WordPress features.
- twentyfourteen_setup()Twenty Fourteen setup.
- twentynineteen_setup()Sets up theme defaults and registers support for various WordPress features.
- twentysixteen_setup()Sets up theme defaults and registers support for various WordPress features.
- twentyten_setup()Sets up theme defaults and registers support for various WordPress features.
- twentythirteen_setup()Twenty Thirteen setup.
- twentytwelve_setup()Twenty Twelve setup.
- twentytwenty_theme_support()Sets up theme defaults and registers support for various WordPress features.
Source code
function set_post_thumbnail_size( $width = 0, $height = 0, $crop = false ) { add_image_size( 'post-thumbnail', $width, $height, $crop );}Changelog
Introduced in 2.9.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
About this page
- Parsed data
- Generated from the wordpress-develop 7.0.4 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
- Something wrong on this page? Report it and it gets fixed in the next regeneration.