php获取中文字符串的首字符拼音字母

1. $str="这是一个测试程序1";
3. echo getFirstCharCode($str);
6. function getFirstCharCode($str){
7. $str= iconv("UTF-8","gb2312", $str);
8. $targetChar='*';
9. $i=0;
11. while($i $tmp=bin2hex(substr($str,$i,1));
12. if($tmp>='B0'){ //汉字的开始
13. $t=getLetter(hexdec(bin2hex(substr($str,$i,2))));
14. $targetChar=$t==-1 ? '*' : $t ;
15. //printf("%c",$t==-1 ? '*' : $t );
16. break;
17. //$i+=2;
18. }
19. else{
20. $targetChar=substr($str,$i,1);
21. break;
22. //printf("%s",substr($str,$i,1));
23. //$i++;
24. }
26. }
27. if(is_numeric($targetChar)){
28. return chr($targetChar);
29. }
30. else{
31. return $targetChar;
32. }
33. }
35. function getLetter($num){
36. $limit=array( //gb2312 拼音排序
37. array(45217,45252), //A
38. array(45253,45760), //B
39. array(45761,46317), //C
40. array(46318,46825), //D
41. array(46826,47009), //E
42. array(47010,47296), //F
43. array(47297,47613), //G
44. array(47614,48118), //H
45. array(0,0), //I
46. array(48119,49061), //J
47. array(49062,49323), //K
48. array(49324,49895), //L
49. array(49896,50370), //M
50. array(50371,50613), //N
51. array(50614,50621), //O
52. array(50622,50905), //P
53. array(50906,51386), //Q
54. array(51387,51445), //R
55. array(51446,52217), //S
56. array(52218,52697), //T
57. array(0,0), //U
58. array(0,0), //V
59. array(52698,52979), //W
60. array(52980,53688), //X
61. array(53689,54480), //Y
62. array(54481,55289), //Z
63. );
64. $char_index=65;
65. foreach($limit as $k=>$v){
66. if($num>=$v[0] && $num $char_index+=$k;
67. return $char_index;
68. }
69. }
70. return -1;
71. }

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