PHP获取汉字拼音首字母

<?php 
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<br/>";
echo pinyin1('这是中文字符串');

?>

<?php
/**
 * @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;   
}
echo getfirstchar("哈哈!"); 
?>