block_core_gallery_resolve_dynamic_source( array $source, WP_Block $block ): int[]
- Since
- 7.0.0
- Source
wp-includes/blocks/gallery.php:108
dynamicContent to an ordered list of image attachment IDs.Description
The source key is the dispatch discriminator and args holds the source's parameters. This { source, args } shape mirrors the Block Bindings metadata shape so dynamic mode can migrate to an innerBlocks binding with minimal change. core/attached-media is a context-relative anchor (the post the gallery is rendered within); future sources translate their REST-named args (author, categories, after/before, media_type, etc.) into WP_Query arguments here.
Compatibility
- WordPress
- since 7.0.0
- PHP
- 7.4–8.6-dev
- 6.7.7
- 6.8.8
- 6.9.7
- 7.0.4
- 7.1.0
Present in 1 of the 5 tracked releases, added in 7.0.0, and compiles on PHP 7.4 through 8.6-dev.
Parameters
$sourcearray- The gallery's
dynamicContentattribute. $blockWP_Block- The gallery block instance being rendered.
Return value
int[]- Ordered list of image attachment IDs.
Performance profile
How much work a call to block_core_gallery_resolve_dynamic_source() does, and what it touches: the algorithmic scaling, the Zend instruction count per call across PHP versions, the hooks it hands control to, and the core code that calls it. Measured from the compiled opcodes, not a stopwatch, so every number is identical on any machine running the same PHP version, and every function in core is ranked by cost.
- Cost class
- Heavy
- Scaling
- Constant
- Instructions
- 5–63
- Plugin surface
- None
- Called by
- 1
Reaches the database via get_post().
No loop in the body: the same number of instructions runs whatever you pass in.
Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 68.
Nothing here hands control to plugin code.
1 place in core call this, so the cost is paid more often than your own code shows.
What it touches
- querycontent query
get_post()one call below block_core_gallery_resolve_dynamic_source()
Further down the call graph this can also reach hook, option, cache, serialize and transient. Those are the worst case, several calls deep and usually down an error path, not what a normal call pays.
What one call costs · 4 distinct outcomes
One number would be a lie: the work depends on which branch runs. These are every distinct cost block_core_gallery_resolve_dynamic_source() can have, taken from its control-flow graph on PHP 8.5.
| When | Instructions | Calls it makes |
|---|---|---|
| always | 5–24 | none |
is_array($source) && $source_name == "core/attached-media" | 22–27 | get_the_ID() |
is_array($source) && $source_name == "core/attached-media" | 51–60 | strtoupper(), post_parent(), array_map() |
is_array($source) && $source_name == "core/attached-media" | 54–63 | get_the_ID(), strtoupper(), post_parent(), array_map() |
Across PHP versions
| PHP | Compiled | Executed | Branches | Notes |
|---|---|---|---|---|
| 8.6-dev | 67 | 5–62 | 11 | 1 fewer instruction than PHP 8.5 |
| 8.5 | 68 | 5–63 | 11 | |
| 8.4 | 68 | 5–63 | 11 | |
| 8.3 | 68 | 5–63 | 11 | |
| 8.2 | 68 | 5–63 | 11 | |
| 8.1 | 68 | 5–63 | 11 | 1 fewer instruction than PHP 7.4 |
| 7.4 | 69 | 5–64 | 11 |
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 · 2
- get_the_ID()Retrieves the ID of the current item in the WordPress Loop.
- WP_Query::__construct()Constructor.
Used by · 1
- block_core_gallery_render()Renders the `core/gallery` block on the server.
Source code
function block_core_gallery_resolve_dynamic_source( $source, $block ) { if ( ! is_array( $source ) ) { return array(); } $source_name = $source['source'] ?? null; $args = isset( $source['args'] ) && is_array( $source['args'] ) ? $source['args'] : array(); switch ( $source_name ) { case 'core/attached-media': // Prefer the post supplied via block context, falling back to the post // being rendered. The fallback is what lets a post-bound template (e.g. // `single`/`page`) resolve against the actual post at render time even // though the editor has no concrete post to preview — the editor gates // the dynamic-mode UI on that same context (see `use-dynamic-gallery.js`). $post_id = $block->context['postId'] ?? get_the_ID(); if ( ! $post_id ) { return array(); } // Map the camelCase `args` (block-attribute convention) to WP_Query // names, defaulting to the same order as the editor preview (see // `dynamic-source.js`). Only REST-supported orderby values are // allowed; `menu_order` is intentionally unsupported (it isn't a // valid media REST `orderby`). $orderby = $args['orderBy'] ?? 'date'; if ( ! in_array( $orderby, array( 'date', 'title' ), true ) ) { $orderby = 'date'; } $order = strtoupper( $args['order'] ?? 'desc' ) === 'ASC' ? 'ASC' : 'DESC'; // Bound the number of resolved images until the gallery supports // pagination. Kept in sync with the editor query's `per_page` cap; a // case-insensitive grep for `max_images` finds both this and // `MAX_IMAGES` in `dynamic-source.js`. $max_images = 100; $query = new WP_Query( array( 'post_parent' => $post_id, 'post_type' => 'attachment', 'post_status' => 'inherit', 'post_mime_type' => 'image', 'orderby' => $orderby, 'order' => $order, 'posts_per_page' => $max_images, 'fields' => 'ids', 'no_found_rows' => true, ) ); return array_map( 'intval', $query->posts ); } // Unknown or not-yet-implemented source type. return array();}Changelog
Introduced in 7.0.0.
Signature, return type and hooks compared across 1 parsed release.
About this page
- Parsed data
- Generated from the wordpress-develop 7.1.0 tag, from
src/wp-includes/blocks/gallery.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.