ThinkPHP的截取字符串函数无法显示省略号的解决方法
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：
functionmsubstr($str,$start=0,$length,$charset="utf-8",$suffix=true)
{
if(function_exists("mb_substr")){
if($suffix)
{
if($str==mb_substr($str,$start,$length,$charset))
{
returnmb_substr($str,$start,$length,$charset);
}
else
{
returnmb_substr($str,$start,$length,$charset)."...";
}
}
else
{
returnmb_substr($str,$start,$length,$charset);
}
}
elseif(function_exists('iconv_substr')){
if($suffix)
{
if($str==iconv_substr($str,$start,$length,$charset))
{
returniconv_substr($str,$start,$length,$charset);
}
else
{
returniconv_substr($str,$start,$length,$charset)."...";
}
}
else
{
returniconv_substr($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;
}