PHP獲取漢字拼音首字母函數

<!--?php
/**


@param unknown_type $str
@return 取得漢字的首字母
/
function getfirstchar($str){

$fchar=$str[0];
//判斷是否為字符串
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;

}
echo getfirstchar("哈哈!");</pre>