_get_non_cached_ids( int[] $object_ids, string $cache_group ): int[]
- Since
- 3.4.0, 6.1.0
- Source
wp-includes/functions.php:7279
Compatibility
- WordPress
- since 6.1.0
- 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
$object_idsint[]- Array of IDs.
$cache_groupstring- The cache group to check against.
Return value
int[]- Array of IDs not present in the cache.
Performance profile
How much work a call to _get_non_cached_ids() does, and what it touches: the algorithmic scaling, the Zend instruction count per call across PHP versions, the hooks it hands control to, and the core code that calls it. Measured from the compiled opcodes, not a stopwatch, so every number is identical on any machine running the same PHP version, and every function in core is ranked by cost.
- Cost class
- Moderate
- Scaling
- Scales with input
- Instructions
- 19–28
- Plugin surface
- None
- Called by
- 6
Only touches the object cache, via wp_cache_get_multiple().
The body loops, so the work grows with what you pass in.
Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 36.
Nothing here hands control to plugin code.
6 places in core call this, so the cost is paid more often than your own code shows.
What it touches
- cacheobject cache
wp_cache_get_multiple()called directly
What one call costs · 2 distinct outcomes
One number would be a lie: the work depends on which branch runs. These are every distinct cost _get_non_cached_ids() can have, taken from its control-flow graph on PHP 8.5.
| When | Instructions | Calls it makes |
|---|---|---|
empty($object_ids) | 19 | array_filter(), array_map(), array_unique() |
!empty($object_ids) | 27–28 | array_filter(), array_map(), array_unique(), wp_cache_get_multiple() |
Across PHP versions
Compiles the same on PHP 7.4, 8.1, 8.2, 8.3, 8.4, 8.5 and 8.6-dev: 36 instructions, 19–28 executed per call, 4 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
- wp_cache_get_multiple()Retrieves multiple values from the cache in one call.
Used by · 6
- _prime_comment_caches()Adds any comments from the given IDs to the cache that do not already exist in cache.
- _prime_network_caches()Adds any networks from the given IDs to the cache that do not already exist in cache.
- _prime_post_caches()Adds any posts from the given IDs to the cache that do not already exist in cache.
- _prime_site_caches()Adds any sites from the given IDs to the cache that do not already exist in cache.
- _prime_term_caches()Adds any terms from the given IDs to the cache that do not already exist in cache.
- cache_users()Retrieves info for user lists to prevent multiple queries by get_userdata().
Source code
function _get_non_cached_ids( $object_ids, $cache_group ) { $object_ids = array_filter( $object_ids, '_validate_cache_id' ); $object_ids = array_unique( array_map( 'intval', $object_ids ), SORT_NUMERIC ); if ( empty( $object_ids ) ) { return array(); } $non_cached_ids = array(); $cache_values = wp_cache_get_multiple( $object_ids, $cache_group ); foreach ( $cache_values as $id => $value ) { if ( false === $value ) { $non_cached_ids[] = (int) $id; } } return $non_cached_ids;}Changelog
Introduced in 3.4.0. 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 6.8.8 tag, from
src/wp-includes/functions.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.