在 Code128 条码中编码控制字符

Posted 2023-03-31

【中文标题】在 Code128 条码中编码控制字符

【英文标题】：Encoding control characters in a Code128 barcode

【发布时间】：2012-08-06 00:14:22

【问题描述】：

下面是我用来创建 Code128 条形码的内容。我试图弄清楚如何在 $code 中进行某种正则表达式搜索以找到类似“^009”的内容并将其替换为“10000110100”而不破坏其余的编码。我的目标是能够在条形码中使用 Code128 控制字符。

我将不再使用控制字符编码：http://en.wikipedia.org/wiki/Code_128

  class Barcode128 
static private $encoding = array(
          '11011001100', '11001101100', '11001100110', '10010011000',
          '10010001100', '10001001100', '10011001000', '10011000100',
          '10001100100', '11001001000', '11001000100', '11000100100',
          '10110011100', '10011011100', '10011001110', '10111001100',
          '10011101100', '10011100110', '11001110010', '11001011100',
          '11001001110', '11011100100', '11001110100', '11101101110',
          '11101001100', '11100101100', '11100100110', '11101100100',
          '11100110100', '11100110010', '11011011000', '11011000110',
          '11000110110', '10100011000', '10001011000', '10001000110',
          '10110001000', '10001101000', '10001100010', '11010001000',
          '11000101000', '11000100010', '10110111000', '10110001110',
          '10001101110', '10111011000', '10111000110', '10001110110',
          '11101110110', '11010001110', '11000101110', '11011101000',
          '11011100010', '11011101110', '11101011000', '11101000110',
          '11100010110', '11101101000', '11101100010', '11100011010',
          '11101111010', '11001000010', '11110001010', '10100110000',
          '10100001100', '10010110000', '10010000110', '10000101100',
          '10000100110', '10110010000', '10110000100', '10011010000',
          '10011000010', '10000110100', '10000110010', '11000010010',
          '11001010000', '11110111010', '11000010100', '10001111010',
          '10100111100', '10010111100', '10010011110', '10111100100',
          '10011110100', '10011110010', '11110100100', '11110010100',
          '11110010010', '11011011110', '11011110110', '11110110110',
          '10101111000', '10100011110', '10001011110', '10111101000',
          '10111100010', '11110101000', '11110100010', '10111011110',
          '10111101110', '11101011110', '11110101110', '11010000100',
          '11010010000', '11010011100', '11000111010');
static public function getDigit($code)
  $tableB = " !\"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz|~";
  $result = "";
  $sum = 0;
  $isum = 0;
  $i = 0;
  $j = 0;
  $value = 0;

  // check each characters
  $len = strlen($code);
  for($i=0; $i<$len; $i++)
    if (strpos($tableB, $code[$i]) === false) return("");
  

  // check firsts characters : start with C table only if enought numeric
  $tableCActivated = $len> 1;
  $c = '';
  for($i=0; $i<3 && $i<$len; $i++)
    $tableCActivated &= preg_match('`[0-9]`', $code[$i]);
  

  $sum = $tableCActivated ? 105 : 104;

  // start : [105] : C table or [104] : B table 
  $result = self::$encoding[ $sum ];

  $i = 0;
  while( $i < $len )
    if (! $tableCActivated)
      $j = 0;
      // check next character to activate C table if interresting
      while ( ($i + $j < $len) && preg_match('`[0-9]`', $code[$i+$j]) ) $j++;

      // 6 min everywhere or 4 mini at the end
      $tableCActivated = ($j > 5) || (($i + $j - 1 == $len) && ($j > 3));

      if ( $tableCActivated )
        $result .= self::$encoding[ 99 ]; // C table
        $sum += ++$isum * 99;
      
      // 2 min for table C so need table B
     else if ( ($i == $len - 1) || (preg_match('`[^0-9]`', $code[$i])) || (preg_match('`[^0-9]`', $code[$i+1])) )  //todo : verifier le JS : len - 1!!! XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
      $tableCActivated = false;
      $result .= self::$encoding[ 100 ]; // B table
      $sum += ++$isum * 100;
    

    if ( $tableCActivated ) 
      $value = intval(substr($code, $i, 2)); // Add two characters (numeric)
      $i += 2;
     else 
      $value = strpos($tableB, $code[$i]); // Add one character
      $i++;
    
    $result  .= self::$encoding[ $value ];
    $sum += ++$isum * $value;
  

  // Add CRC
  $result  .= self::$encoding[ $sum % 103 ];

  // Stop
  $result .= self::$encoding[ 106 ];

  // Termination bar
  $result .= '11';

  return($result);

谁能帮我解决这个问题？我该怎么做？

【参考方案1】：

您可以尝试查看此处提供的代码：

http://www.davidscotttufts.com/code/barcode.phps

因为他似乎已经很好地解决了几种不同类型条形码的生成问题，包括 CODE128。