wxr_nav_menu_terms()
- Since
- 3.1.0
- Source
wp-admin/includes/export.php:448
Compatibility
- WordPress
- since 3.1.0
- 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.
Performance profile
How much work a call to wxr_nav_menu_terms() 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
- Scales with input
- Instructions
- 6–11
- Plugin surface
- None
- Called by
- 1
Reaches the database via get_terms().
The body loops, so the work grows with how much data it finds.
Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 32.
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
- hookthird-party callbacks
apply_filters()one call below wxr_nav_menu_terms() - querycontent query
get_terms()one call below wxr_nav_menu_terms()
Further down the call graph this can also reach 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 · 1 distinct outcome
One number would be a lie: the work depends on which branch runs. These are every distinct cost wxr_nav_menu_terms() can have, taken from its control-flow graph on PHP 8.5.
| When | Instructions | Calls it makes |
|---|---|---|
| always | 6–11 | wp_get_nav_menus() |
Across PHP versions
Compiles the same on PHP 7.4, 8.1, 8.2, 8.3, 8.4, 8.5 and 8.6-dev: 32 instructions, 6–11 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 · 3
- wp_get_nav_menus()Returns all navigation menu objects.
- wxr_cdata()Wraps given string in XML CDATA tag.
- wxr_term_name()Outputs a term_name XML tag from a given term object.
Used by · 1
- export_wp()Generates the WXR export file for download.
Source code
function wxr_nav_menu_terms() { $nav_menus = wp_get_nav_menus(); if ( empty( $nav_menus ) || ! is_array( $nav_menus ) ) { return; } foreach ( $nav_menus as $menu ) { echo "\t<wp:term>"; echo '<wp:term_id>' . (int) $menu->term_id . '</wp:term_id>'; echo '<wp:term_taxonomy>nav_menu</wp:term_taxonomy>'; echo '<wp:term_slug>' . wxr_cdata( $menu->slug ) . '</wp:term_slug>'; wxr_term_name( $menu ); echo "</wp:term>\n"; } }Changelog
Introduced in 3.1.0. 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 7.1.0 tag, from
src/wp-admin/includes/export.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.