get_the_content_feed( string $feed_type = null ): string
- Since
- 2.9.0
- Source
wp-includes/feed.php:190
Compatibility
- WordPress
- since 2.9.0
- 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
$feed_typestringoptional- The type of feed. rss2 | atom | rss | rdfDefault:
null
Return value
string- The filtered content.
Performance profile
How much work a call to get_the_content_feed() 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
- 18–21
- Plugin surface
- 2 hooks
- Called by
- 1
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, depending on the branch taken. The body compiles to 21.
Third-party callbacks on 'the_content', 'the_content_feed' run inside this call, and their cost is not bounded by anything here.
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()called directly - querycontent query
get_post()one call below get_the_content_feed()
Further down the call graph this can also reach option, transient, cache and serialize. Those are the worst case, several calls deep and usually down an error path, not what a normal call pays.
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_the_content_feed() can have, taken from its control-flow graph on PHP 8.5.
| When | Instructions | Calls it makes |
|---|---|---|
| always | 18 | get_the_content(), apply_filters(), apply_filters() |
| always | 21 | get_default_feed(), get_the_content(), apply_filters(), apply_filters() |
Across PHP versions
| PHP | Compiled | Executed | Branches | Notes |
|---|---|---|---|---|
| 8.6-dev | 21 | 18–21 | 1 | |
| 8.5 | 21 | 18–21 | 1 | |
| 8.4 | 21 | 18–21 | 1 | 3 fewer instructions than PHP 8.3 |
| 8.3 | 24 | 21–24 | 1 | |
| 8.2 | 24 | 21–24 | 1 | |
| 8.1 | 24 | 21–24 | 1 | |
| 7.4 | 24 | 21–24 | 1 |
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 · 2
2 hooks fire while get_the_content_feed() runs, in this order:
- apply_filters( the_content_feed )filterline 208 (+18 into the body)
Filters the post content for use in feeds.
Uses · 3
- get_default_feed()Retrieves the default feed.
- apply_filters()Calls the callback functions that have been added to a filter hook.
- get_the_content()Retrieves the post content.
Used by · 1
- the_content_feed()Displays the post content for feeds.
Source code
function get_the_content_feed( $feed_type = null ) { if ( ! $feed_type ) { $feed_type = get_default_feed(); } /** This filter is documented in wp-includes/post-template.php */ $content = apply_filters( 'the_content', get_the_content() ); $content = str_replace( ']]>', ']]>', $content ); /** * Filters the post content for use in feeds. * * @since 2.9.0 * * @param string $content The current post content. * @param string $feed_type Type of feed. Possible values include 'rss2', 'atom'. * Default 'rss2'. */ return apply_filters( 'the_content_feed', $content, $feed_type );}Changelog
Introduced in 2.9.0. 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 6.9.7 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.