diff options
Diffstat (limited to 'phpBB/includes/functions.php')
| -rw-r--r-- | phpBB/includes/functions.php | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/phpBB/includes/functions.php b/phpBB/includes/functions.php index 41dad77141..c55931a2fb 100644 --- a/phpBB/includes/functions.php +++ b/phpBB/includes/functions.php @@ -3250,6 +3250,48 @@ function get_preg_expression($mode) } /** +* Generate regexp for naughty words censoring +* Depends on whether installed PHP version supports unicode properties +* +* @param string $word word template to be replaced +* +* @return string $preg_expr regex to use with word censor +*/ +function get_censor_preg_expression($word) +{ + static $unicode = null; + + if (empty($word)) + { + return ''; + } + + // Check whether PHP version supports unicode properties + if (is_null($unicode)) + { + $unicode = pcre_utf8_support(); + } + + if ($unicode) + { + // Unescape the asterisk to simplify further conversions + $word = str_replace('\*', '*', preg_quote($word, '#')); + + // Replace asterisk(s) inside the pattern, at the start and at the end of it with regexes + $word = preg_replace(array('#(?<=[\p{Nd}\p{L}_])\*+(?=[\p{Nd}\p{L}_])#iu', '#^\*+#', '#\*+$#'), array('([\x20]*?|[\p{Nd}\p{L}_-]*?)', '[\p{Nd}\p{L}_-]*?', '[\p{Nd}\p{L}_-]*?'), $word); + + // Generate the final substitution + $preg_expr = '#(?<![\p{Nd}\p{L}_-])(' . $word . ')(?![\p{Nd}\p{L}_-])#iu'; + } + else + { + $preg_expr = '#(?<!\S)(' . str_replace('\*', '\S*?', preg_quote($word, '#')) . ')(?!\S)#iu'; + } + + return $preg_expr; +} + +/** * Returns the first block of the specified IPv6 address and as many additional * ones as specified in the length paramater. * If length is zero, then an empty string is returned. |