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Comments: Make moderated or disallowed key check case-insensitive for non-Latin words.

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The `check_comment()` and `wp_check_comment_disallowed_list()` functions are expected to be case-insensitive, but that only worked for words using Latin script and consisting of ASCII characters.

This commit adds the Unicode flag to the regular expression used for the check in these functions, so that both pattern and subject can be treated as UTF-8 strings.

Reference: [https://www.php.net/manual/en/reference.pcre.pattern.modifiers.php PHP Manual: Pattern Modifiers].

Follow-up to [984], [2075], [48121], [48575].

Props bonjour52, SergeyBiryukov.
Fixes #57207.
Built from https://develop.svn.wordpress.org/trunk@54888


git-svn-id: http://core.svn.wordpress.org/trunk@54440 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This commit is contained in:
Sergey Biryukov 2022-11-28 19:44:17 +00:00
parent 3884bd3c6e
commit b105e59c23
2 changed files with 3 additions and 3 deletions
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4
wp-includes/comment.php
View File

@ -97,7 +97,7 @@ function check_comment( $author, $email, $url, $comment, $user_ip, $user_agent,
* Check the comment fields for moderation keywords. If any are found, * Check the comment fields for moderation keywords. If any are found,
* fail the check for the given field by returning false. * fail the check for the given field by returning false.
*/ */
$pattern = "#$word#i"; $pattern = "#$word#iu";
if ( preg_match( $pattern, $author ) ) { if ( preg_match( $pattern, $author ) ) {
return false; return false;
} }
@ -1357,7 +1357,7 @@ function wp_check_comment_disallowed_list( $author, $email, $url, $comment, $use
// in the spam words don't break things: // in the spam words don't break things:
$word = preg_quote( $word, '#' ); $word = preg_quote( $word, '#' );
$pattern = "#$word#i"; $pattern = "#$word#iu";
if ( preg_match( $pattern, $author ) if ( preg_match( $pattern, $author )
|| preg_match( $pattern, $email ) || preg_match( $pattern, $email )
|| preg_match( $pattern, $url ) || preg_match( $pattern, $url )

2
wp-includes/version.php
View File

@ -16,7 +16,7 @@
* *
* @global string $wp_version * @global string $wp_version
*/ */
$wp_version = '6.2-alpha-54887'; $wp_version = '6.2-alpha-54888';
/** /**
* Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema. * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.