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PHP实现汉字或英文按照首字母查找

时间：2021-07-01 10:21:17 帮助过：12人阅读

  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($s小贝) - 65536;
  18. if($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. }


首字母, PHP

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