wp_get_note_mentioned_user_ids( string $content ): int[]
- Since
- 7.1.0
- Source
wp-includes/comment.php:2607
Description
Mentions are stored as chips carrying the wp-note-mention class plus a user-N class token holding the mentioned user's ID: <span class="wp-note-mention user-N">@Name</span>. Only elements that carry both classes are treated as mentions.
Compatibility
- WordPress
- since 7.1.0
- PHP
- 7.4–8.6-dev
- 6.7.7
- 6.8.8
- 6.9.7
- 7.0.4
- 7.1.0
Present in 1 of the 5 tracked releases, added in 7.1.0, and compiles on PHP 7.4 through 8.6-dev.
Parameters
$contentstring- Note (comment) content, as stored.
Return value
int[]- Unique, positive mentioned user IDs.
Performance profile
How much work a call to wp_get_note_mentioned_user_ids() does, and what it touches: the algorithmic scaling, the Zend instruction count per call across PHP versions, the hooks it hands control to, and the core code that calls it. Measured from the compiled opcodes, not a stopwatch, so every number is identical on any machine running the same PHP version, and every function in core is ranked by cost.
- Cost class
- Light
- Scaling
- Scales with input
- Instructions
- 4–21
- Plugin surface
- None
- Called by
- 1
Touches nothing outside its own arguments.
The body loops, so the work grows with what you pass in.
Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 40.
Nothing here hands control to plugin code.
1 place in core call this, so the cost is paid more often than your own code shows.
What one call costs · 2 distinct outcomes
One number would be a lie: the work depends on which branch runs. These are every distinct cost wp_get_note_mentioned_user_ids() can have, taken from its control-flow graph on PHP 8.5.
| When | Instructions | Calls it makes |
|---|---|---|
!$content | 4 | none |
$content && !->next_tag() | 21 | ->next_tag(), array_unique(), array_values() |
Across PHP versions
| PHP | Compiled | Executed | Branches | Notes |
|---|---|---|---|---|
| 8.6-dev | 40 | 4–21 | 6 | |
| 8.5 | 40 | 4–21 | 6 | |
| 8.4 | 40 | 4–21 | 6 | 3 fewer instructions than PHP 8.3 |
| 8.3 | 43 | 7–24 | 6 | |
| 8.2 | 43 | 7–24 | 6 | |
| 8.1 | 43 | 7–24 | 6 | 1 fewer instruction than PHP 7.4 |
| 7.4 | 44 | 7–25 | 6 |
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
- str_contains()Polyfill for `str_contains()` function added in PHP 8.0.
- WP_HTML_Tag_Processor::__construct()Constructor.
Used by · 1
- wp_notify_note_mentions()Notifies mentioned users about a new note.
Source code
function wp_get_note_mentioned_user_ids( string $content ): array { if ( ! str_contains( $content, 'wp-note-mention' ) ) { return array(); } $user_ids = array(); $processor = new WP_HTML_Tag_Processor( $content ); while ( $processor->next_tag( array( 'tag_name' => 'SPAN', 'class_name' => 'wp-note-mention', ) ) ) { foreach ( $processor->class_list() as $class_name ) { if ( 1 === preg_match( '/^user-(\d+)$/', $class_name, $matches ) ) { $user_id = (int) $matches[1]; if ( $user_id > 0 ) { $user_ids[] = $user_id; } break; } } } return array_values( array_unique( $user_ids, SORT_NUMERIC ) );}Changelog
Introduced in 7.1.0.
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/comment.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.