private function getfirstchar($s0){         $s=iconv('UTF-8','gb2312', $s0);         if (ord($s0)>128) { //汉字开头             $asc=ord($s{0})*256+ord($s{1})-65536;             if($asc>=-20319 and $asc<=-20284)return "A";             if($asc>=-20283 and $asc<=-19776)return "B";             if($asc>=-19775 and $asc<=-19219)return "C";             if($asc>=-19218 and $asc<=-18711)return "D";             if($asc>=-18710 and $asc<=-18527)return "E";             if($asc>=-18526 and $asc<=-18240)return "F";             if($asc>=-18239 and $asc<=-17923)return "G";             if($asc>=-17922 and $asc<=-17418)return "I";                          if($asc>=-17417 and $asc<=-16475)return "J";                          if($asc>=-16474 and $asc<=-16213)return "K";                          if($asc>=-16212 and $asc<=-15641)return "L";                          if($asc>=-15640 and $asc<=-15166)return "M";                          if($asc>=-15165 and $asc<=-14923)return "N";                          if($asc>=-14922 and $asc<=-14915)return "O";                          if($asc>=-14914 and $asc<=-14631)return "P";                          if($asc>=-14630 and $asc<=-14150)return "Q";                          if($asc>=-14149 and $asc<=-14091)return "R";                          if($asc>=-14090 and $asc<=-13319)return "S";                          if($asc>=-13318 and $asc<=-12839)return "T";                          if($asc>=-12838 and $asc<=-12557)return "W";                          if($asc>=-12556 and $asc<=-11848)return "X";                          if($asc>=-11847 and $asc<=-11056)return "Y";                          if($asc>=-11055 and $asc<=-10247)return "Z";          }else if(ord($s)>=48 and ord($s)<=57){ //数字开头             switch(iconv_substr($s,0,1,'utf-8'))             {                 case 1:return "Y";                 case 2:return "E";                 case 3:return "S";                 case 4:return "S";                 case 5:return "W";                 case 6:return "L";                 case 7:return "Q";                 case 8:return "B";                 case 9:return "J";                 case 0:return "L";             }                        }else if(ord($s)>=65 and ord($s)<=90){ //大写英文开头             return substr($s,0,1);         }else if(ord($s)>=97 and ord($s)<=122){ //小写英文开头             return strtoupper(substr($s,0,1));         }         else         {             return iconv_substr($s0,0,1,'utf-8');//中英混合的词语，不适合上面的各种情况，因此直接提取首个字符即可         }     }