php 获取姓名首个汉字拼音

<?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 $asc<= -17418) return"H";
    if($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 pinyin1("刘章霞");
?>

结果是：LZX  (所有汉字拼音的首字母)