Smarty截取中文扩展，支持UTF-8和GB

Smarty截取中文扩展，支持UTF-8和GB

 

 1 function  smarty_modifier_truncate_cn( $string ,   $length   =   80 ,   $code   =   ' UTF-8 ' ,   $etc   =   ' ' )
 2 {
 3      if  ( $length   ==   0 )
 4          return   '' ;
 5      if ( $code   ==   ' UTF-8 ' ){
 6          $pa   =   " /[\x01-\x7f]|[\xc2-\xdf][\x80-\xbf]|\xe0[\xa0-\xbf][\x80-\xbf]|[\xe1-\xef][\x80-\xbf][\x80-\xbf]|\xf0[\x90-\xbf][\x80-\xbf][\x80-\xbf]|[\xf1-\xf7][\x80-\xbf][\x80-\xbf][\x80-\xbf]/ " ;
 7     }
 8      else {
 9          $pa   =   " /[\x01-\x7f]|[\xa1-\xff][\xa1-\xff]/ " ;
10     }
11      preg_match_all ( $pa ,   $string ,   $t_string );
12      if ( count ( $t_string [ 0 ])  >   $length )
13          return   join ( '' ,   array_slice ( $t_string [ 0 ] ,   0 ,   $length )) . $etc ;
14      return   join ( '' ,   array_slice ( $t_string [ 0 ] ,   0 ,   $length ));
15 }

以下代码保存为ascii格式

 1 < html >
 2 < head >
 3 < title > Truncate 测试 </ title >
 4 < meta  http-equiv ="Content-Type"  content ="text/html; charset=gbk"   />
 5 </ head >
 6 < body >
 7 {{$string}} < br >
 8 {{$string|truncate_cn:15:"":""}} < br >
 9 </ body >
10 </ html >

以下代码保存为:UTF-8格式

 1 < html >
 2 < head >
 3 < title > Truncate 测试 </ title >
 4 < meta  http-equiv ="Content-Type"  content ="text/html; charset=UTF-8"   />
 5 </ head >
 6 < body >
 7 {{$string}} < br >
 8 {{$string|truncate_cn:15:"UTF-8":""}} < br >
 9 </ body >
10 </ html >