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php中文支持函数 php中文截取字符串函数 PHP中文字符串翻转

WBOY
WBOY原创
2016-07-25 08:57:34906浏览
  2. /**
  3. * 将一个字串中含有全角的数字字符、字母、空格或'%+-()'字符转换为相应半角字符
  4. *
  5. * @access public
  6. * @param string $str 待转换字串
  7. *
  8. * @return string $str 处理后字串
  9. */
  10. function make_semiangle($str)
  11. {
  12. $arr = array('０' => '0', '１' => '1', '２' => '2', '３' => '3', '４' => '4',
  13. '５' => '5', '６' => '6', '７' => '7', '８' => '8', '９' => '9',
  14. 'Ａ' => 'A', 'Ｂ' => 'B', 'Ｃ' => 'C', 'Ｄ' => 'D', 'Ｅ' => 'E',
  15. 'Ｆ' => 'F', 'Ｇ' => 'G', 'Ｈ' => 'H', 'Ｉ' => 'I', 'Ｊ' => 'J',
  16. 'Ｋ' => 'K', 'Ｌ' => 'L', 'Ｍ' => 'M', 'Ｎ' => 'N', 'Ｏ' => 'O',
  17. 'Ｐ' => 'P', 'Ｑ' => 'Q', 'Ｒ' => 'R', 'Ｓ' => 'S', 'Ｔ' => 'T',
  18. 'Ｕ' => 'U', 'Ｖ' => 'V', 'Ｗ' => 'W', 'Ｘ' => 'X', 'Ｙ' => 'Y',
  19. 'Ｚ' => 'Z', 'ａ' => 'a', 'ｂ' => 'b', 'ｃ' => 'c', 'ｄ' => 'd',
  20. 'ｅ' => 'e', 'ｆ' => 'f', 'ｇ' => 'g', 'ｈ' => 'h', 'ｉ' => 'i',
  21. 'ｊ' => 'j', 'ｋ' => 'k', 'ｌ' => 'l', 'ｍ' => 'm', 'ｎ' => 'n',
  22. 'ｏ' => 'o', 'ｐ' => 'p', 'ｑ' => 'q', 'ｒ' => 'r', 'ｓ' => 's',
  23. 'ｔ' => 't', 'ｕ' => 'u', 'ｖ' => 'v', 'ｗ' => 'w', 'ｘ' => 'x',
  24. 'ｙ' => 'y', 'ｚ' => 'z',
  25. '（' => '(', '）' => ')', '〔' => '[', '〕' => ']', '【' => '[',
  26. '】' => ']', '〖' => '[', '〗' => ']', '“' => '[', '”' => ']',
  27. '‘' => '[', '’' => ']', '｛' => '{', '｝' => '}', '《' => ' '》' => '>',
  28. '％' => '%', '＋' => '+', '—' => '-', '－' => '-', '～' => '-',
  29. '：' => ':', '。' => '.', '、' => ',', '，' => '.', '、' => '.',
  30. '；' => ',', '？' => '?', '！' => '!', '…' => '-', '‖' => '|',
  31. '”' => '"', '’' => '`', '‘' => '`', '｜' => '|', '〃' => '"',
  32. '　' => ' ','＄'=>'$','＠'=>'@','＃'=>'#','＾'=>'^','＆'=>'&','＊'=>'*');
  34. return strtr($str, $arr);
  35. }
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例2，php中文截取字符串

  2. /*
  3. Utf-8、gb2312都支持的汉字截取函数
  4. cut_str(字符串, 截取长度, 开始长度, 编码);
  5. 编码默认为 utf-8
  6. 开始长度默认为 0
  7. * edit: bbs.it-home.org
  8. */
  9. function cut_str($string, $sublen, $start = 0, $code = 'UTF-8') {
  10. if ($code == 'UTF-8') {
  11. $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]/";
  12. preg_match_all ( $pa, $string, $t_string );
  13. if (count ( $t_string [0] ) - $start > $sublen)
  14. return join ( '', array_slice ( $t_string [0], $start, $sublen ) ) . "...";
  15. return join ( '', array_slice ( $t_string [0], $start, $sublen ) );
  16. } else {
  17. $start = $start * 2;
  18. $sublen = $sublen * 2;
  19. $strlen = strlen ( $string );
  20. $tmpstr = '';
  21. for($i = 0; $i if ($i >= $start && $i if (ord ( substr ( $string, $i, 1 ) ) > 129) {
  22. $tmpstr .= substr ( $string, $i, 2 );
  23. } else {
  24. $tmpstr .= substr ( $string, $i, 1 );
  25. }
  26. }
  27. if (ord ( substr ( $string, $i, 1 ) ) > 129)
  28. $i ++;
  29. }
  30. if (strlen ( $tmpstr ) $tmpstr .= "...";
  31. return $tmpstr;
  32. }
  33. }
  34. $str = "abcd需要截取的字符串";
  35. echo cut_str ( $str, 1, 0, 'gb2312' );
  36. ?>
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例3，字符串的载取

  3. /**
  4. * 字符截取 支持UTF8/GBK
  5. * @param $string
  6. * @param $length
  7. * @param $dot
  8. */
  9. function str_cut($string, $length, $charset = 'utf-8', $dot = '...') {
  10. $strlen = strlen($string);
  11. if($strlen $string = str_replace(array(' ',' ', '&', '"', ''', '“', '”', '—', '<', '>', '·', '…'), array('∵',' ', '&', '"', "'", '“', '”', '—', '', '·', '…'), $string);
  12. $strcut = '';
  13. if(strtolower($charset) == 'utf-8') {
  14. $length = intval($length-strlen($dot)-$length/3);
  15. $n = $tn = $noc = 0;
  16. while($n $t = ord($string[$n]);
  17. if($t == 9 || $t == 10 || (32 $tn = 1; $n++; $noc++;
  18. } elseif(194 $tn = 2; $n += 2; $noc += 2;
  19. } elseif(224 $tn = 3; $n += 3; $noc += 2;
  20. } elseif(240 $tn = 4; $n += 4; $noc += 2;
  21. } elseif(248 $tn = 5; $n += 5; $noc += 2;
  22. } elseif($t == 252 || $t == 253) {
  23. $tn = 6; $n += 6; $noc += 2;
  24. } else {
  25. $n++;
  26. }
  27. if($noc >= $length) {
  28. break;
  29. }
  30. }
  31. if($noc > $length) {
  32. $n -= $tn;
  33. }
  34. $strcut = substr($string, 0, $n);
  35. $strcut = str_replace(array('∵', '&', '"', "'", '“', '”', '—', '', '·', '…'), array(' ', '&', '"', ''', '“', '”', '—', '<', '>', '·', '…'), $strcut);
  36. } else {
  37. $dotlen = strlen($dot);
  38. $maxi = $length - $dotlen - 1;
  39. $current_str = '';
  40. $search_arr = array('&',' ', '"', "'", '“', '”', '—', '', '·', '…','∵');
  41. $replace_arr = array('&',' ', '"', ''', '“', '”', '—', '<', '>', '·', '…',' ');
  42. $search_flip = array_flip($search_arr);
  43. for ($i = 0; $i $current_str = ord($string[$i]) > 127 ? $string[$i].$string[++$i] : $string[$i];
  44. if (in_array($current_str, $search_arr)) {
  45. $key = $search_flip[$current_str];
  46. $current_str = str_replace($search_arr[$key], $replace_arr[$key], $current_str);
  47. }
  48. $strcut .= $current_str;
  49. }
  50. }
  51. return $strcut.$dot;
  52. }
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例4，PHP中文字符串翻转 翻转一个字符串可以使用strrev()函数即可。 但有时需要处理是字符串是含中文的，这样用strrev就会出现乱码。 这里自定义一个函数来处理含中文的字符。

  3. /**

  4. * 中文字符串翻转
  5. * by bbs.it-home.org
  6. */
  7. function cstrrev($str)
  8. {
  9. $len = strlen($str);
  10. for($i = 0; $i {
  11. $char = $str{0};
  12. if(ord($char) > 127)
  13. {
  14. $i++;
  15. if($i {
  16. $arr[] = substr($str, 0, 2);
  17. $str = substr($str, 2);
  18. }
  19. }
  20. else
  21. {
  22. $arr[] = $char;
  23. $str = substr($str, 1);
  24. }
  25. }
  26. return join(array_reverse($arr));
  27. }

  28. #使用方法：

  29. $str = '中文.look!';
  30. echo cstrrev($str);
  31. #结果输出：!kool.文中
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附5，

  2. function str_replace_cn($needle, $str, $haystack, $charset = "utf-8"){
  3. $re['utf-8'] = "/[\x01-\x7f]|[\xc2-\xdf][\x80-\xbf]|[\xe0-\xef][\x80-\xbf]{2}|[\xf0-\xff][\x80-\xbf]{3}/";
  4. $re['gb2312'] = "/[\x01-\x7f]|[\xb0-\xf7][\xa0-\xfe]/";
  5. $re['gbk'] = "/[\x01-\x7f]|[\x81-\xfe][\x40-\xfe]/";
  6. $re['big5'] = "/[\x01-\x7f]|[\x81-\xfe]([\x40-\x7e]|\xa1-\xfe])/";
  8. preg_match_all($re[$charset], $haystack, $match_haystack);
  9. preg_match_all($re[$charset], $needle, $match_needle);
  11. for($i = 0; $i if(!in_array($match_needle[0][$i], $match_haystack[0]))return $haystack;//无匹配
  12. }
  14. $match_haystack = $match_haystack[0];
  15. $match_needle = $match_needle[0];
  17. for($i = 0; $i if($match_haystack[$i] == "")continue;
  18. if($match_haystack[$i] == $match_needle[0]){
  19. if(count($match_needle) == 1){//如果只一个字符
  20. $match_haystack[$i] = $str;
  21. }else{
  22. $flag = true;
  23. for($j = 1; $j if($match_haystack[$i + $j] != $match_needle[$j]){
  24. $flag = false;
  25. break;
  26. }
  27. }
  28. if($flag){//匹配
  29. $match_haystack[$i] = $str;
  30. for($j = 1; $j $match_haystack[$i + $j] = "";
  31. }
  32. }
  33. }
  34. }
  35. }
  36. return implode("", $match_haystack);
  37. }
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