_oembed_create_xml( array $data, SimpleXMLElement $node = null ): string|false
- Since
- 4.4.0
- Source
wp-includes/embed.php:810
Compatibility
- WordPress
- since 4.4.0
- 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
$dataarray- The original oEmbed response data.
$nodeSimpleXMLElementoptional- XML node to append the result to recursively.Default:
null
Return value
string|false- XML string on success, false on error.
Performance profile
How much work a call to _oembed_create_xml() does, and what it touches: the algorithmic scaling, the Zend instruction count per call across PHP versions, the hooks it hands control to, and the core code that calls it. Measured from the compiled opcodes, not a stopwatch, so every number is identical on any machine running the same PHP version, and every function in core is ranked by cost.
- Cost class
- Light
- Scaling
- Scales with input
- Instructions
- 5–18
- Plugin surface
- None
- Called by
- 2
Touches nothing outside its own arguments.
The body loops, so the work grows with what you pass in.
Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 42.
Nothing here hands control to plugin code.
2 places in core call this, so the cost is paid more often than your own code shows.
What it touches
- hookthird-party callbacks
apply_filters()one call below _oembed_create_xml()
Further down the call graph this can also reach option, cache, serialize, query and transient. Those are the worst case, several calls deep and usually down an error path, not what a normal call pays.
What one call costs · 2 distinct outcomes
One number would be a lie: the work depends on which branch runs. These are every distinct cost _oembed_create_xml() can have, taken from its control-flow graph on PHP 8.5.
| When | Instructions | Calls it makes |
|---|---|---|
| always | 5–7 | none |
is_array($data) && !empty($data) | 13–18 | ->asXML() |
Across PHP versions
| PHP | Compiled | Executed | Branches | Notes |
|---|---|---|---|---|
| 8.6-dev | 42 | 5–18 | 7 | |
| 8.5 | 42 | 5–18 | 7 | |
| 8.4 | 42 | 5–18 | 7 | 2 fewer instructions than PHP 8.3 |
| 8.3 | 44 | 5–18 | 7 | |
| 8.2 | 44 | 5–18 | 7 | |
| 8.1 | 44 | 5–18 | 7 | |
| 7.4 | 44 | 5–18 | 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 · 3
- _oembed_create_xml()Creates an XML string from a given array.
- esc_html()Escaping for HTML blocks.
- SimpleXMLElement::__construct()
Used by · 2
- _oembed_create_xml()Creates an XML string from a given array.
- _oembed_rest_pre_serve_request()Hooks into the REST API output to print XML instead of JSON.
Source code
function _oembed_create_xml( $data, $node = null ) { if ( ! is_array( $data ) || empty( $data ) ) { return false; } if ( null === $node ) { $node = new SimpleXMLElement( '<oembed></oembed>' ); } foreach ( $data as $key => $value ) { if ( is_numeric( $key ) ) { $key = 'oembed'; } if ( is_array( $value ) ) { $item = $node->addChild( $key ); _oembed_create_xml( $value, $item ); } else { $node->addChild( $key, esc_html( $value ) ); } } return $node->asXML();}Changelog
Introduced in 4.4.0. 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 6.7.7 tag, from
src/wp-includes/embed.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.