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PHP intercepts UTF8 or GBK encoded Chinese and English strings

WBOY
Release： 2016-07-25 08:53:51
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  3. //String interception

  4. $a = "s＠@Hello";
  5. var_dump(strlen_weibo($a,'utf-8'));
  6. Result The output is 8, in which the letter s counts as 1, the full-width @ counts as 2, the half-width @ counts as 1, and the two Chinese characters count as 4. The source code is as follows:

  7. //Function code to intercept strings

  8. function strlen_weibo($string, $charset='utf-8')
  9. {
  10. $n = $count = 0;
  11. $ length = strlen($string);
  12. if (strtolower($charset) == 'utf-8')
  13. {
  14. while ($n < $length)
  15. {
  16. $currentByte = ord($string[$n] );
  17. if ($currentByte == 9 ||
  18. $currentByte == 10 ||
  19. (32 <= $currentByte && $currentByte <= 126)) // bbs.it-home.org
  20. {
  21. $ n++;
  22. $count++;
  23. } elseif (194 <= $currentByte && $currentByte <= 223)
  24. {
  25. $n += 2;
  26. $count += 2;
  27. } elseif (224 <= $currentByte && $currentByte <= 239)
  28. {
  29. $n += 3;
  30. $count += 2;
  31. } elseif (240 <= $currentByte && $currentByte <= 247)
  32. {
  33. $n += 4 ;
  34. $count += 2;
  35. } elseif (248 <= $currentByte && $currentByte <= 251)
  36. {
  37. $n += 5;
  38. $count += 2;
  39. } elseif ($currentByte == 252 || $currentByte == 253)
  40. {
  41. $n += 6;
  42. $count += 2;
  43. } else
  44. {
  45. $n++;
  46. $count++;
  47. }
  48. if ($count >= $length )
  49. {
  50. break;
  51. }
  52. }
  53. return $count;
  54. } else
  55. {
  56. for ($i = 0; $i < $length; $i++)
  57. {
  58. if (ord($string[$i ]) > 127)
  59. {
  60. $i++;
  61. $count++;
  62. }
  63. $count++;
  64. }
  65. return $count;
  66. }
  67. }

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Related labels：
php截取utf8或gbk编码中英文字符串
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