diff options
Diffstat (limited to 'inc/utf8.php')
| -rw-r--r-- | inc/utf8.php | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/inc/utf8.php b/inc/utf8.php index 16722ab2e..0323bed4b 100644 --- a/inc/utf8.php +++ b/inc/utf8.php @@ -762,6 +762,31 @@ function utf8_bad_replace($str, $replace = '') { return $result; } +/** + * adjust a byte index into a utf8 string to a utf8 character boundary + * + * @param $str string utf8 character string + * @param $i int byte index into $str + * @param $next bool direction to search for boundary, + * false = up (current character) + * true = down (next character) + * + * @return int byte index into $str now pointing to a utf8 character boundary + * + * @author chris smith <chris@jalakai.co.uk> + */ +function utf8_correctIdx(&$str,$i,$next=false) { + + if ($next) { + $limit = strlen($str); + while (($i<$limit) && ((ord($str[$i]) & 0xC0) == 0x80)) $i++; + } else { + while ($i && ((ord($str[$i]) & 0xC0) == 0x80)) $i--; + } + + return $i; +} + // only needed if no mb_string available if(!UTF8_MBSTRING){ |