未命名
/**
*截取字符串,汉字占两个字节，字母占一个字节
*页面编码必须为utf-8*/function esub($str, $length = 0,$ext = "..."){ if($length < 1){ return $str;
} //计算字符串长度
$strlen = (strlen($str) + mb_strlen($str,"UTF-8")) / 2; if($strlen < $length){ return $str;
} if(mb_check_encoding($str,"UTF-8")){ $str = mb_strcut(mb_convert_encoding($str, "GBK","UTF-8"), 0, $length, "GBK"); $str = mb_convert_encoding($str, "UTF-8", "GBK");
}else{ return "不支持的文档编码";
}
$str = rtrim($str," ,.。，-——（【、；‘“??《<@"); return $str.$ext;
}