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Fix combining character set, allow limit for combining characters

This commit is contained in:
discomrade 2021-07-10 01:37:31 -02:00
parent dc81de9d5c
commit 3bd090995d
3 changed files with 12 additions and 13 deletions
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5
inc/config.php
View File

@ -484,8 +484,11 @@
// Strip superfluous new lines at the end of a post.
$config['strip_superfluous_returns'] = true;
// Strip combining characters from Unicode strings (eg. "Zalgo").
// Strip combining characters from Unicode strings (eg. "Zalgo"). This will impact some non-English languages.
$config['strip_combining_chars'] = true;
// Maximum number of combining characters in a row allowed in Unicode strings so that they can still be used in moderation.
// Requires $config['strip_combining_chars'] = true;
$config['max_combining_chars'] = 0;
// Maximum post body length.
$config['max_body'] = 1800;

16
inc/functions.php
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@ -2257,19 +2257,11 @@ function ordutf8($string, &$offset) {
return $code;
}
// Limit Non_Spacing_Mark and Enclosing_Mark characters
function strip_combining_chars($str) {
$chars = preg_split('//u', $str, -1, PREG_SPLIT_NO_EMPTY);
$str = '';
foreach ($chars as $char) {
$o = 0;
$ord = ordutf8($char, $o);
if ( ($ord >= 768 && $ord <= 879) || ($ord >= 1536 && $ord <= 1791) || ($ord >= 3655 && $ord <= 3659) || ($ord >= 7616 && $ord <= 7679) || ($ord >= 8400 && $ord <= 8447) || ($ord >= 65056 && $ord <= 65071))
continue;
$str .= $char;
}
return $str;
global $config;
$limit = strval($config['max_combining_chars']+1);
return preg_replace('/(\p{Me}|\p{Mn}){'.$limit.',}/u','', $str);
}
function buildThread($id, $return = false, $mod = false) {

4
inc/instance-config.php
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@ -106,6 +106,10 @@ $config['threads_preview'] = 5;
$config['root'] = '/';
$config['secure_trip_salt'] = 'ODQ2NDM0ODlmMmRhNzk2M2EyNjJlOW';
$config['strip_combining_chars'] = true;
// Maximum number of combining characters in a row allowed so that they can still be used in moderation.
$config['max_combining_chars'] = 3;
//Banners
$config['url_banner'] = '/banners.php';