/**
 * @param unknown_type $str
 * @return 取得汉字的首字母
 */
function getfirstchar($str){  
 $fchar=$str[0];
 //判断是否为字符串
 if(ord($fchar)>=ord("A") && ord($fchar)<=ord("z") )
  return strtoupper($fchar);
 $str=iconv("UTF-8","gb2312", $str);  
 $asc=ord($str[0])*256+ord($str[1])-65536;  
 if($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 $asc<=-17418)return "H";                
 if($asc>=-17417 and $asc<=-16475)return "I";                
 if($asc>=-16474 and $asc<=-16213)return "J";                
 if($asc>=-16212 and $asc<=-15641)return "K";                
 if($asc>=-15640 and $asc<=-15166)return "L";                
 if($asc>=-15165 and $asc<=-14923)return "M";                
 if($asc>=-14922 and $asc<=-14915)return "N";                
 if($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;  
}  
 //测试   
 echo getfirstchar("热烈庆祝新中国成立60周年!");  
?>