wp_kses_attr_parse( string $element ): array|false
- Since
- 4.2.3
- Source
wp-includes/kses.php:1677
Description
Does not modify input. May return "evil" output.
Based on wp_kses_split2() and wp_kses_attr().
Compatibility
- WordPress
- since 4.2.3
- 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
$elementstring- HTML element.
Return value
array|false- List of attributes found in the element. Returns false on failure.
Performance profile
How much work a call to wp_kses_attr_parse() 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
- 9–47
- Plugin surface
- None
- Called by
- 1
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, depending on the branch taken. The body compiles to 51.
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 one call costs · 3 distinct outcomes
One number would be a lie: the work depends on which branch runs. These are every distinct cost wp_kses_attr_parse() can have, taken from its control-flow graph on PHP 8.5.
| When | Instructions | Calls it makes |
|---|---|---|
| always | 9–16 | preg_match() |
$valid === 1 && $slash === "" && $attrarr === false | 30–36 | preg_match(), preg_match(), wp_kses_hair_parse() |
$valid === 1 && $slash === "" && $attrarr !== false | 41–47 | preg_match(), preg_match(), wp_kses_hair_parse(), array_unshift(), array_push() |
Across PHP versions
| PHP | Compiled | Executed | Branches | Notes |
|---|---|---|---|---|
| 8.6-dev | 51 | 9–47 | 4 | |
| 8.5 | 51 | 9–47 | 4 | |
| 8.4 | 51 | 9–47 | 4 | 3 fewer instructions than PHP 8.3 |
| 8.3 | 54 | 9–50 | 4 | |
| 8.2 | 54 | 9–50 | 4 | |
| 8.1 | 54 | 9–50 | 4 | |
| 7.4 | 54 | 9–50 | 4 |
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 · 1
- wp_kses_hair_parse()Builds an attribute list from string containing attributes.
Used by · 1
- do_shortcodes_in_html_tags()Searches only inside HTML elements for shortcodes and process them.
Source code
function wp_kses_attr_parse( $element ) { $valid = preg_match( '%^(<\s*)(/\s*)?([a-zA-Z0-9]+\s*)([^>]*)(>?)$%', $element, $matches ); if ( 1 !== $valid ) { return false; } $begin = $matches[1]; $slash = $matches[2]; $elname = $matches[3]; $attr = $matches[4]; $end = $matches[5]; if ( '' !== $slash ) { // Closing elements do not get parsed. return false; } // Is there a closing XHTML slash at the end of the attributes? if ( 1 === preg_match( '%\s*/\s*$%', $attr, $matches ) ) { $xhtml_slash = $matches[0]; $attr = substr( $attr, 0, -strlen( $xhtml_slash ) ); } else { $xhtml_slash = ''; } // Split it. $attrarr = wp_kses_hair_parse( $attr ); if ( false === $attrarr ) { return false; } // Make sure all input is returned by adding front and back matter. array_unshift( $attrarr, $begin . $slash . $elname ); array_push( $attrarr, $xhtml_slash . $end ); return $attrarr;}Changelog
Introduced in 4.2.3. 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 7.0.4 tag, from
src/wp-includes/kses.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.