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Four php Chinese string interception functions

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Release： 2016-07-25 09:04:19
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  2. //Intercept Chinese string
  3. function mysubstr($str, $start, $len) {
  4. $tmpstr = "";
  5. $strlen = $start + $len;
  6. for( $i = 0; $i < $strlen; $i++) {
  7. if(ord(substr($str, $i, 1)) > 0xa0) {
  8. $tmpstr .= substr($str, $i, 2);
  9. $i++;
  10. } else
  11. $tmpstr .= substr($str, $i, 1);
  12. }
  13. return $tmpstr;
  14. }
  15. ?>
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2, Intercept utf8 encoded multi-byte string

  2. < ?php
  3. //Intercept utf8 string
  4. function utf8Substr($str, $from, $len)
  5. {
  6. return preg_replace('#^(?:[x00-x7F]|[ xC0-xFF][x80-xBF]+){0,'.$from.'}'.
  7. '((?:[x00-x7F]|[xC0-xFF][x80-xBF]+){0, '.$len.'}).*#s',
  8. '$1',$str);
  9. }
  10. ?>
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3,UTF-8, and GB2312 all support Chinese character interception function

  2. < ?php
  3. /*
  4. @Utf-8, gb2312 supported Chinese character interception function
  5. @cut_str (string, interception length, starting length, encoding);
  6. @The encoding defaults to utf- 8
  7. @The default start length is 0
  8. @http://bbs.it-home.org
  9. */
  10. function cut_str($string, $sublen, $start = 0, $code = 'UTF-8')
  11. {
  12. if($code == 'UTF-8')
  13. {
  14. $pa = "/[x01-x7f]|[xc2-xdf][x80-xbf]|xe0[xa0-xbf][x80-xbf]| [xe1-xef][x80-xbf][x80-xbf]|xf0[x90-xbf][x80-xbf][x80-xbf]|[xf1-xf7][x80-xbf][x80-xbf][x80 -xbf]/";
  15. preg_match_all($pa, $string, $t_string);
  16. if(count($t_string[0]) - $start > $sublen) return join('', array_slice($t_string[0] ], $start, $sublen))."...";
  17. return join('', array_slice($t_string[0], $start, $sublen));
  18. }
  19. else
  20. {
  21. $start = $ start*2;
  22. $sublen = $sublen*2;
  23. $strlen = strlen($string);
  24. $tmpstr = '';
  25. for($i=0; $i< $strlen; $i++)
  26. {
  27. if($i>=$start && $i< ($start+$sublen))
  28. {
  29. if(ord(substr($string, $i, 1))>129)
  30. {
  31. $tmpstr.= substr( $string, $i, 2);
  32. }
  33. else
  34. {
  35. $tmpstr.= substr($string, $i, 1);
  36. }
  37. }
  38. if(ord(substr($string, $i, 1) )>129) $i++;
  39. }
  40. if(strlen($tmpstr)< $strlen ) $tmpstr.= "...";
  41. return $tmpstr;
  42. }
  43. }
  44. $str = "abcd needs to be intercepted string";
  45. echo cut_str($str, 8, 0, 'gb2312');
  46. ?>
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4, BugFree character interception function

  2. < ?php
  3. /**
  4. * @package BugFree
  5. * @version $Id: FunctionsMain.inc.php,v 1.32 2005/09/24 11:38:37 wwccss Exp $
  6. * @http://bbs.it-home.org
  7. *
  8. * Return part of a string(Enhance the function substr())
  9. *
  10. * @author Chunsheng Wang
  11. * @param string $String the string to cut.
  12. * @param int $Length the length of returned string.
  13. * @param booble $Append whether append "...": false|true
  14. * @return string the cutted string.
  15. */
  16. function sysSubStr($String,$Length,$Append = false)
  17. {
  18. if (strlen($String) < = $Length )
  19. {
  20. return $String;
  21. }
  22. else
  23. {
  24. $I = 0;
  25. while ($I < $Length)
  26. {
  27. $StringTMP = substr($String,$I,1);
  28. if ( ord($StringTMP) >=224 )
  29. {
  30. $StringTMP = substr($String,$I,3);
  31. $I = $I + 3;
  32. }
  33. elseif( ord($StringTMP) >=192 )
  34. {
  35. $StringTMP = substr($String,$I,2);
  36. $I = $I + 2;
  37. }
  38. else
  39. {
  40. $I = $I + 1;
  41. }
  42. $StringLast[] = $StringTMP;
  43. }
  44. $StringLast = implode("",$StringLast);
  45. if($Append)
  46. {
  47. $StringLast .= "...";
  48. }
  49. return $StringLast;
  50. }
  51. }
  52. $ String = "bbs.it-home.org Scripting School is dedicated to you;
  53. $Length = "18";
  54. $Append = false;
  55. echo sysSubStr($String,$Length,$Append);
  56. ?>
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Related labels：
四个php中文字符串截取函数
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