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-rw-r--r--phpBB/includes/functions.php42
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.