wp_embed_handler_youtube( array $matches, array $attr, string $url, array $rawattr ): string
- Since
- 4.0.0
- Source
wp-includes/embed.php:242
Description
Catches YouTube iframe embed URLs that are not parsable by oEmbed but can be translated into a URL that is.
Compatibility
- WordPress
- since 4.0.0
- 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
$matchesarray- The RegEx matches from the provided regex when calling wp_embed_register_handler().
$attrarray- Embed attributes.
$urlstring- The original URL that was matched by the regex.
$rawattrarray- The original unmodified attributes.
Return value
string- The embed HTML.
Performance profile
How much work a call to wp_embed_handler_youtube() 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
- Trivial
- Scaling
- Constant
- Instructions
- 22
- Plugin surface
- 1 hook
- Called by
- 0
Touches nothing outside its own arguments.
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 22.
Third-party callbacks on 'wp_embed_handler_youtube' run inside this call, and their cost is not bounded by anything here.
Nothing in core calls this; the cost is only what you spend yourself.
What it touches
- hookthird-party callbacks
apply_filters()called directly
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 wp_embed_handler_youtube() can have, taken from its control-flow graph on PHP 8.5.
| When | Instructions | Calls it makes |
|---|---|---|
| always | 22 | urlencode(), ->autoembed(), apply_filters() |
Across PHP versions
| PHP | Compiled | Executed | Branches | Notes |
|---|---|---|---|---|
| 8.6-dev | 22 | 22 | 0 | |
| 8.5 | 22 | 22 | 0 | |
| 8.4 | 22 | 22 | 0 | 3 fewer instructions than PHP 8.3 |
| 8.3 | 25 | 25 | 0 | |
| 8.2 | 25 | 25 | 0 | |
| 8.1 | 25 | 25 | 0 | |
| 7.4 | 25 | 25 | 0 |
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 wp_embed_handler_youtube() runs, in this order:
- apply_filters( wp_embed_handler_youtube )filterline 258 (+16 into the body)
Filters the YouTube embed output.
Uses · 1
- apply_filters()Calls the callback functions that have been added to a filter hook.
Source code
function wp_embed_handler_youtube( $matches, $attr, $url, $rawattr ) { global $wp_embed; $embed = $wp_embed->autoembed( sprintf( 'https://youtube.com/watch?v=%s', urlencode( $matches[2] ) ) ); /** * Filters the YouTube embed output. * * @since 4.0.0 * * @see wp_embed_handler_youtube() * * @param string $embed YouTube embed output. * @param array $attr An array of embed attributes. * @param string $url The original URL that was matched by the regex. * @param array $rawattr The original unmodified attributes. */ return apply_filters( 'wp_embed_handler_youtube', $embed, $attr, $url, $rawattr );}Changelog
Introduced in 4.0.0. 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.