get_intermediate_image_sizes(): string[]
- Since
- 3.0.0
- Source
wp-includes/media.php:883
Compatibility
- WordPress
- since 3.0.0
- 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.
Return value
string[]- An array of image size names.
Performance profile
How much work a call to get_intermediate_image_sizes() 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
- 11–19
- Plugin surface
- 1 hook
- Called by
- 6
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, depending on the branch taken. The body compiles to 19.
Third-party callbacks on 'intermediate_image_sizes' run inside this call, and their cost is not bounded by anything here.
6 places in core call this, so the cost is paid more often than your own code shows.
What it touches
- hookthird-party callbacks
apply_filters()called directly
What one call costs · 2 distinct outcomes
One number would be a lie: the work depends on which branch runs. These are every distinct cost get_intermediate_image_sizes() can have, taken from its control-flow graph on PHP 8.5.
| When | Instructions | Calls it makes |
|---|---|---|
empty($additional_sizes) | 11 | wp_get_additional_image_sizes(), apply_filters() |
!empty($additional_sizes) | 19 | wp_get_additional_image_sizes(), array_keys(), array_merge(), apply_filters() |
Across PHP versions
Compiles the same on PHP 7.4, 8.1, 8.2, 8.3, 8.4, 8.5 and 8.6-dev: 19 instructions, 11–19 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.
Hooks and filters fired · 1
One hook fires while get_intermediate_image_sizes() runs, in this order:
- apply_filters( intermediate_image_sizes )filterline 899 (+16 into the body)
Filters the list of intermediate image sizes.
Uses · 2
- wp_get_additional_image_sizes()Retrieves additional image sizes.
- apply_filters()Calls the callback functions that have been added to a filter hook.
Used by · 6
- WP_Widget_Media_Gallery::get_instance_schema()Get schema for properties of a widget instance (item).
- WP_Widget_Media_Image::get_instance_schema()Get schema for properties of a widget instance (item).
- WP_Widget_Media_Image::render_media()Render the media on the frontend.
- wp_get_registered_image_subsizes()Returns a normalized list of all currently registered image sub-sizes.
- wp_restore_image()Restores the metadata for a given attachment.
- wp_save_image()Saves image to post, along with enqueued changes in `$_REQUEST['history']`.
Source code
function get_intermediate_image_sizes() { $default_sizes = array( 'thumbnail', 'medium', 'medium_large', 'large' ); $additional_sizes = wp_get_additional_image_sizes(); if ( ! empty( $additional_sizes ) ) { $default_sizes = array_merge( $default_sizes, array_keys( $additional_sizes ) ); } /** * Filters the list of intermediate image sizes. * * @since 2.5.0 * * @param string[] $default_sizes An array of intermediate image size names. Defaults * are 'thumbnail', 'medium', 'medium_large', 'large'. */ return apply_filters( 'intermediate_image_sizes', $default_sizes );}Changelog
Introduced in 3.0.0. 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 6.9.7 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.