本文给大家分享的是使用php简单实现的提取中英文字符的首字母的方法和示例，十分的使用，有需要的小伙伴可以参考下。

PHP实现获取中英文按照首字母

1. /**
2. *
3. */
4. function getfirstchar($s0){
5. if($s0[0]=='I' || $s[0]=='i'){
6. return "I";
7. }elseif($s0[0]=='U' || $s[0]=='u'){
8. return 'U';
9. }elseif($s0[0]=='V' || $s[0]=='v'){
10. return 'V';
11. }else{
12. $fchar = ord($s0{0});
13. if($fchar >= ord("A") and $fchar <= ord("z") )return strtoupper($s0{0});
14. $s1 = iconv("UTF-8","gb2312", $s0);
15. $s2 = iconv("gb2312","UTF-8", $s1);
16. if($s2 == $s0){$s = $s1;}else{$s = $s0;}
17. $asc = ord($s{0}) * 256 + ord($s{1}) - 65536;
18. if($asc >= -20319 and $asc <= -20284) return "A";
19. if($asc >= -20283 and $asc <= -19776) return "B";
20. if($asc >= -19775 and $asc <= -19219) return "C";
21. if($asc >= -19218 and $asc <= -18711) return "D";
22. if($asc >= -18710 and $asc <= -18527) return "E";
23. if($asc >= -18526 and $asc <= -18240) return "F";
24. if($asc >= -18239 and $asc <= -17923) return "G";
25. if($asc >= -17922 and $asc <= -17418) return "H";
26. if($asc >= -17417 and $asc <= -16475) return "J";
27. if($asc >= -16474 and $asc <= -16213) return "K";
28. if($asc >= -16212 and $asc <= -15641) return "L";
29. if($asc >= -15640 and $asc <= -15166) return "M";
30. if($asc >= -15165 and $asc <= -14923) return "N";
31. if($asc >= -14922 and $asc <= -14915) return "O";
32. if($asc >= -14914 and $asc <= -14631) return "P";
33. if($asc >= -14630 and $asc <= -14150) return "Q";
34. if($asc >= -14149 and $asc <= -14091) return "R";
35. if($asc >= -14090 and $asc <= -13319) return "S";
36. if($asc >= -13318 and $asc <= -12839) return "T";
37. if($asc >= -12838 and $asc <= -12557) return "W";
38. if($asc >= -12556 and $asc <= -11848) return "X";
39. if($asc >= -11847 and $asc <= -11056) return "Y";
40. if($asc >= -11055 and $asc <= -10247) return "Z";
41. return null;
42. }
43. }

以上所述就是本文的全部内容了，希望大家能够喜欢。