获取多个汉字首字母(php)

 1 <?php 
 2 function getfirstchar($s0){   
 3     $fchar = ord($s0{0});
 4     if($fchar >= ord("A") and $fchar <= ord("z") )return strtoupper($s0{0});
 5     $s1 = iconv("UTF-8","gb2312", $s0);
 6     $s2 = iconv("gb2312","UTF-8", $s1);
 7     if($s2 == $s0){$s = $s1;}else{$s = $s0;}
 8     $asc = ord($s{0}) * 256 + ord($s{1}) - 65536;
 9     if($asc >= -20319 and $asc <= -20284) return "A";
10     if($asc >= -20283 and $asc <= -19776) return "B";
11     if($asc >= -19775 and $asc <= -19219) return "C";
12     if($asc >= -19218 and $asc <= -18711) return "D";
13     if($asc >= -18710 and $asc <= -18527) return "E";
14     if($asc >= -18526 and $asc <= -18240) return "F";
15     if($asc >= -18239 and $asc <= -17923) return "G";
16     if($asc >= -17922 and $asc <= -17418) return "I";
17     if($asc >= -17417 and $asc <= -16475) return "J";
18     if($asc >= -16474 and $asc <= -16213) return "K";
19     if($asc >= -16212 and $asc <= -15641) return "L";
20     if($asc >= -15640 and $asc <= -15166) return "M";
21     if($asc >= -15165 and $asc <= -14923) return "N";
22     if($asc >= -14922 and $asc <= -14915) return "O";
23     if($asc >= -14914 and $asc <= -14631) return "P";
24     if($asc >= -14630 and $asc <= -14150) return "Q";
25     if($asc >= -14149 and $asc <= -14091) return "R";
26     if($asc >= -14090 and $asc <= -13319) return "S";
27     if($asc >= -13318 and $asc <= -12839) return "T";
28     if($asc >= -12838 and $asc <= -12557) return "W";
29     if($asc >= -12556 and $asc <= -11848) return "X";
30     if($asc >= -11847 and $asc <= -11056) return "Y";
31     if($asc >= -11055 and $asc <= -10247) return "Z";
32     return null;
33 }
34  
35  
36 function pinyin1($zh){
37     $ret = "";
38     $s1 = iconv("UTF-8","gb2312", $zh);
39     $s2 = iconv("gb2312","UTF-8", $s1);
40     if($s2 == $zh){$zh = $s1;}
41     for($i = 0; $i < strlen($zh); $i++){
42         $s1 = substr($zh,$i,1);
43         $p = ord($s1);
44         if($p > 160){
45             $s2 = substr($zh,$i++,2);
46             $ret .= getfirstchar($s2);
47         }else{
48             $ret .= $s1;
49         }
50     }
51     return $ret;
52 }
53 echo "北京信息学校<br/>";
54 echo pinyin1(‘北京信息学校‘);