//取汉字的asc区间然后返回汉字首字母了,代码如下: header("Content-type: text/html; charset=utf-8");     function getfirstchar($s0){             $fchar = ord($s0{0});          if($fchar >= ord("A") and $fchar <= ord("z") ){            return strtoupper($s0{0});          }                $s1 = iconv("UTF-8","gb2312", $s0);          $s2 = iconv("gb2312","UTF-8", $s1);                 if($s2 == $s0){
   $s = $s1;}else{
   $s = $s0;}          $asc = ord($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 $asc <= -10247) return "Z";          return null;      }                    function pinyin1($zh){          $ret = "";          $s1 = iconv("UTF-8","gb2312", $zh);          $s2 = iconv("gb2312","UTF-8", $s1);          if($s2 == $zh){
   $zh = $s1;}          for($i = 0; $i < strlen($zh); $i++){              $s1 = substr($zh,$i,1);              $p = ord($s1);              if($p > 160){                  $s2 = substr($zh,$i++,2);                  $ret .= getfirstchar($s2);              }else{                  $ret .= $s1;              }          }          return $ret;      }      echo "这是中文字符串
";      echo pinyin1('这是中文字符串');