msubstrfunction msubstr($str, $start=0, $length, $charset="utf-8", $suffix=true){<br>
if(function_exists("mb_substr"))<br>
return mb_substr($str, $start, $length, $charset);<br>
elseif(function_exists('iconv_substr')) {<br>
return iconv_substr($str,$start,$length,$charset);<br>
}<br>
$re['utf-8'] = "/[\x01-\x7f]|[\xc2-\xdf][\x80-\xbf]|[\xe0-\xef][\x80-\xbf]{2}|[\xf0-\xff][\x80-\xbf]{3}/";<br>
$re['gb2312'] = "/[\x01-\x7f]|[\xb0-\xf7][\xa0-\xfe]/";<br>
$re['gbk'] = "/[\x01-\x7f]|[\x81-\xfe][\x40-\xfe]/";<br>
$re['big5'] = "/[\x01-\x7f]|[\x81-\xfe]([\x40-\x7e]|\xa1-\xfe])/";<br>
preg_match_all($re[$charset], $str, $match);<br>
$slice = join("",array_slice($match[0], $start, $length));<br>
if($suffix) return $slice."…";<br>
return $slice;<br>
}
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