the_permalink_rss()
- Since
- 2.3.0
- Source
wp-includes/feed.php:244
Compatibility
- WordPress
- since 2.3.0
- 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 the_permalink_rss() 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
- 11
- Plugin surface
- 1 hook
- Called by
- 2
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. The body compiles to 11.
Third-party callbacks on 'the_permalink_rss' run inside this call, and their cost is not bounded by anything here.
2 places in core call this, so the cost is paid more often than your own code shows.
What it touches
- hookthird-party callbacks
apply_filters()called directly - querycontent query
get_post()one call below the_permalink_rss() - optionoption read or write
get_option()one call below the_permalink_rss()
Further down the call graph this can also reach 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 the_permalink_rss() can have, taken from its control-flow graph on PHP 8.5.
| When | Instructions | Calls it makes |
|---|---|---|
| always | 11 | get_permalink(), apply_filters(), esc_url() |
Across PHP versions
Compiles the same on PHP 7.4, 8.1, 8.2, 8.3, 8.4, 8.5 and 8.6-dev: 11 instructions, 11 executed per call, 0 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.
Hooks and filters fired · 1
One hook fires while the_permalink_rss() runs, in this order:
- apply_filters( the_permalink_rss )filterline 252 (+8 into the body)
Filters the permalink to the post for use in feeds.
Uses · 3
- esc_url()Checks and cleans a URL.
- apply_filters()Calls the callback functions that have been added to a filter hook.
- get_permalink()Retrieves the full permalink for the current post or post ID.
Used by · 2
- export_wp()Generates the WXR export file for download.
- permalink_single_rss()Print the permalink to the RSS feed.
Source code
function the_permalink_rss() { /** * Filters the permalink to the post for use in feeds. * * @since 2.3.0 * * @param string $post_permalink The current post permalink. */ echo esc_url( apply_filters( 'the_permalink_rss', get_permalink() ) );}Changelog
Introduced in 2.3.0. 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/feed.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.