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Docs: Expand valid_unicode function documentation.

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The `valid_unicode()` function accepts a limited set of codepoints according to the XML specification. Document the allowed codepoints and link to relevant documentation.

Developed in https://github.com/WordPress/wordpress-develop/pull/9100.

Props jonsurrell, dmsnell.
See #6583, #63166.

Built from https://develop.svn.wordpress.org/trunk@60405


git-svn-id: http://core.svn.wordpress.org/trunk@59741 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This commit is contained in:
jonsurrell
2025-07-02 12:35:28 +00:00
parent c2ca912e5e
commit b21189e96f
2 changed files with 25 additions and 5 deletions
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28
wp-includes/kses.php
View File

@@ -2083,18 +2083,38 @@ function wp_kses_normalize_entities3( $matches ) {
/**
* Determines if a Unicode codepoint is valid.
*
* The definition of a valid Unicode codepoint is taken from the XML definition:
*
* > Characters
* >
* > …
* > Legal characters are tab, carriage return, line feed, and the legal characters of
* > Unicode and ISO/IEC 10646.
* > …
* > Char ::= #x9 | #xA | #xD | [#x20-#xD7FF] | [#xE000-#xFFFD] | [#x10000-#x10FFFF]
*
* @since 2.7.0
*
* @see https://www.w3.org/TR/xml/#charsets
*
* @param int $i Unicode codepoint.
* @return bool Whether or not the codepoint is a valid Unicode codepoint.
*/
function valid_unicode( $i ) {
$i = (int) $i;
return ( 0x9 === $i || 0xa === $i || 0xd === $i ||
( 0x20 <= $i && $i <= 0xd7ff ) ||
( 0xe000 <= $i && $i <= 0xfffd ) ||
( 0x10000 <= $i && $i <= 0x10ffff )
return (
0x9 === $i || // U+0009 HORIZONTAL TABULATION (HT)
0xA === $i || // U+000A LINE FEED (LF)
0xD === $i || // U+000D CARRIAGE RETURN (CR)
/*
* The valid Unicode characters according to the XML specification:
*
* > any Unicode character, excluding the surrogate blocks, FFFE, and FFFF.
*/
( 0x20 <= $i && $i <= 0xD7FF ) ||
( 0xE000 <= $i && $i <= 0xFFFD ) ||
( 0x10000 <= $i && $i <= 0x10FFFF )
);
}

2
wp-includes/version.php
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@@ -16,7 +16,7 @@
*
* @global string $wp_version
*/
$wp_version = '6.9-alpha-60404';
$wp_version = '6.9-alpha-60405';
/**
* Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.