ThinkPHP有一个内置字符截取函数msubstr()如下:
在function.php定义msubstr函数
调用该函数:
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- 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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