wppaste
WordPress

wp_kses_js_entities( string $content ): string

Since
1.0.0
Source
wp-includes/deprecated.php:3843
Removes the HTML JavaScript entities found in early versions of Netscape 4.

Description

Previously, this function was pulled in from the original import of kses and removed a specific vulnerability only existent in early version of Netscape 4. However, this vulnerability never affected any other browsers and can be considered safe for the modern web.

The regular expression which sanitized this vulnerability has been removed in consideration of the performance and energy demands it placed, now merely passing through its input to the return.

Compatibility

Deprecated in WordPress 4.7.0. Officially dropped security support for Netscape 4.

WordPress
since 1.0.0
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

$contentstring

Return value

string

Performance profile

How much work a call to wp_kses_js_entities() 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

Touches nothing outside its own arguments.

Scaling
Constant

No loop in the body: the same number of instructions runs whatever you pass in.

Instructions
8

Executed per call on PHP 8.5. The body compiles to 8.

Plugin surface
None

Nothing here hands control to plugin code.

Called by
0

Nothing in core calls this; the cost is only what you spend yourself.

What it touches

  • hookthird-party callbacksdo_action()one call below wp_kses_js_entities()

Further down the call graph this can also reach query, option, 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 wp_kses_js_entities() can have, taken from its control-flow graph on PHP 8.5.

WhenInstructionsCalls it makes
always8_deprecated_function()

Across PHP versions

PHPCompiledExecutedBranchesNotes
8.6-dev880
8.5880
8.48803 fewer instructions than PHP 8.3
8.311110
8.211110
8.111110
7.411110

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

Source code

View on Trac View on GitHub 

function wp_kses_js_entities( $content ) {	_deprecated_function( __FUNCTION__, '4.7.0' ); 	return preg_replace( '%&\s*\{[^}]*(\}\s*;?|$)%', '', $content );}

Changelog

Introduced in 1.0.0. Unchanged from 6.7.7 through 7.1.0.

  1. 6.7.7
  2. 6.8.8
  3. 6.9.7
  4. 7.0.4
  5. 7.1.0

Signature, return type and hooks compared across 5 parsed releases.

4.7.0
Deprecated. Officially dropped security support for Netscape 4.from the docblock
1.0.0
Introduced.from the docblock

About this page

Parsed data
Generated from the wordpress-develop 6.8.8 tag, from src/wp-includes/deprecated.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.
Corrections
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