对于ThinkPHP的截取字符串函数无法显示省略号的情况，解决方法如下：
打开Common/extend.php页面，修改msubstr函数如下：
function msubstr($str, $start=0, $length, $charset="utf-8", $suffix=true)
{
if(function_exists("mb_substr")) {
if($suffix)
{
if($str==mb_substr($str, $start, $length, $charset))
{
return mb_substr($str, $start, $length, $charset);
}
else
{
return mb_substr($str, $start, $length, $charset)."...";
}
}
else
{
return mb_substr($str, $start, $length, $charset);
}
}
elseif(function_exists('iconv_substr')) {
if($suffix)
{
if($str==iconv_substr($str,$start,$length,$charset))
{
return iconv_substr($str,$start,$length,$charset);
}
else
{
return iconv_substr($str,$start,$length,$charset)."...";
}
}
else
{
return iconv_substr($str,$start,$length,$charset);
}
}
$re['utf-8'] = "/[x01-x7f]|[xc2-xdf][x80-xbf]|[xe0-xef][x80-xbf]{2}|[xf0-xff][x80-xbf]{3}/";
$re['gb2312'] = "/[x01-x7f]|[xb0-xf7][xa0-xfe]/";
$re['gbk'] = "/[x01-x7f]|[x81-xfe][x40-xfe]/";
$re['big5'] = "/[x01-x7f]|[x81-xfe]([x40-x7e]|xa1-xfe])/";
preg_match_all($re[$charset], $str, $match);
$slice = join("",array_slice($match[0], $start, $length));
if($suffix) return $slice."…";
return $slice;
}