ThinkPHP有一个内置字符截取函数msubstr()如下：
msubstr($str, $start=0, $length, $charset=”utf-8″, $suffix=true) $str:要截取的字符串 $start=0：开始位置，默认从0开始 $length：截取长度 $charset=”utf-8″：字符编码，默认UTF－8 $suffix=true：是否在截取后的字符后面显示省略号，默认true显示，false为不显示
在function.php定义msubstr函数
function msubstr($str, $start=0, $length, $charset="utf-8", $suffix=true){if(function_exists("mb_substr")){if($suffix){return mb_substr($str, $start, $length, $charset)."...";}else{return mb_substr($str, $start, $length, $charset);}}elseif(function_exists('iconv_substr')) {if($suffix){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."...";}else{return $slice;}}
调用该函数：
{$vo['title']|msubstr=5,5,'utf-8',false}
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