block_core_tab_list_render_callback( array $attributes, string $content, WP_Block $block ): string
- Since
- 7.1.0
- Source
wp-includes/blocks/tab-list.php:24
Description
Injects IAPI directives into the saved button HTML. The buttons already carry color/border/padding styles from save.js; this callback adds tab-specific attributes (id, aria-controls, context) and interactivity directives using data from the tabs-list context.
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
$attributesarray- Block attributes.
$contentstring- Block content (rendered buttons from save.js).
$blockWP_Block- WP_Block instance.
Return value
string- Updated HTML.
Performance profile
How much work a call to block_core_tab_list_render_callback() does, and what it touches: the algorithmic scaling, the Zend instruction count per call across PHP versions, the hooks it hands control to, and the core code that calls it. Measured from the compiled opcodes, not a stopwatch, so every number is identical on any machine running the same PHP version, and every function in core is ranked by cost.
- Cost class
- Light
- Scaling
- Scales with input
- Instructions
- 29–47
- Plugin surface
- None
- Called by
- 0
Touches nothing outside its own arguments.
The body loops, so the work grows with what you pass in.
Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 90.
Nothing here hands control to plugin code.
Nothing in core calls this; the cost is only what you spend yourself.
What one call costs · 8 distinct outcomes
One number would be a lie: the work depends on which branch runs. These are every distinct cost block_core_tab_list_render_callback() can have, taken from its control-flow graph on PHP 8.5.
| When | Instructions | Calls it makes |
|---|---|---|
empty($attributes) && !->next_tag() && empty($tabs_list) | 29–30 | __(), ->next_tag(), ->get_updated_html() |
!empty($attributes) && !->next_tag() && empty($tabs_list) | 30–31 | wp_strip_all_tags(), ->next_tag(), ->get_updated_html() |
empty($attributes) && ->next_tag() && empty($tabs_list) | 33–34 | __(), ->next_tag(), ->set_attribute(), ->get_updated_html() |
!empty($attributes) && ->next_tag() && empty($tabs_list) | 34–35 | wp_strip_all_tags(), ->next_tag(), ->set_attribute(), ->get_updated_html() |
empty($attributes) && !->next_tag() && !empty($tabs_list) | 35–42 | __(), ->next_tag(), ->next_tag(), ->get_updated_html() |
!empty($attributes) && !->next_tag() && !empty($tabs_list) | 36–43 | wp_strip_all_tags(), ->next_tag(), ->next_tag(), ->get_updated_html() |
empty($attributes) && ->next_tag() && !empty($tabs_list) | 39–46 | __(), ->next_tag(), ->set_attribute(), ->next_tag(), ->get_updated_html() |
!empty($attributes) && ->next_tag() && !empty($tabs_list) | 40–47 | wp_strip_all_tags(), ->next_tag(), ->set_attribute(), ->next_tag(), ->get_updated_html() |
Across PHP versions
| PHP | Compiled | Executed | Branches | Notes |
|---|---|---|---|---|
| 8.6-dev | 88 | 28–46 | 7 | 2 fewer instructions than PHP 8.5 |
| 8.5 | 90 | 29–47 | 7 | |
| 8.4 | 90 | 29–47 | 7 | |
| 8.3 | 90 | 29–47 | 7 | |
| 8.2 | 90 | 29–47 | 7 | |
| 8.1 | 90 | 29–47 | 7 | |
| 7.4 | 90 | 29–47 | 7 |
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 · 4
- __()Retrieves the translation of $text.
- wp_strip_all_tags()Properly strips all HTML tags including 'script' and 'style'.
- wp_json_encode()Encodes a variable into JSON, with some confidence checks.
- WP_HTML_Tag_Processor::__construct()Constructor.
Source code
function block_core_tab_list_render_callback( array $attributes, string $content, \WP_Block $block ): string { $tabs_list = $block->context['core/tabs-list'] ?? array(); $aria_label = empty( $attributes['ariaLabel'] ) ? __( 'Tabbed content' ) : wp_strip_all_tags( $attributes['ariaLabel'] ); $tag_processor = new WP_HTML_Tag_Processor( $content ); if ( $tag_processor->next_tag( array( 'class_name' => 'wp-block-tab-list' ) ) ) { $tag_processor->set_attribute( 'aria-label', $aria_label ); } if ( empty( $tabs_list ) ) { return $tag_processor->get_updated_html(); } $tab_index = 0; while ( $tag_processor->next_tag( 'button' ) ) { $tab_id = $tabs_list[ $tab_index ] ?? null; if ( null === $tab_id ) { break; } $tag_processor->set_attribute( 'id', 'tab__' . $tab_id ); $tag_processor->set_attribute( 'aria-controls', $tab_id ); $tag_processor->set_attribute( 'data-wp-on--click', 'actions.handleTabClick' ); $tag_processor->set_attribute( 'data-wp-on--keydown', 'actions.handleTabKeyDown' ); $tag_processor->set_attribute( 'data-wp-bind--aria-selected', 'state.isActiveTab' ); $tag_processor->set_attribute( 'data-wp-bind--tabindex', 'state.tabIndexAttribute' ); $tag_processor->set_attribute( 'data-wp-context', wp_json_encode( array( 'tabIndex' => $tab_index ) ) ); ++$tab_index; } return $tag_processor->get_updated_html();}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/blocks/tab-list.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.