使 Quoted_printable_encode() 在 PHP4 上工作

Question

我正在尝试使用 quoted_printable_encode()和 [quoted_prinatble_decode()，但问题是我的服务器运行的是 PHP4，并且根据 PHP 文档，quoted_printable_encode() 仅在 PHP 5 >= 5.3.0 上可用。有谁知道黑客或解决方法，以便我可以利用编码功能

Answer 1

根据文档，您可以使用 imap_8bit，但是您应该真的考虑升级到php5。它已经存在了 6 年多了！

Answer 2

我对大家的支持和帮助感激不尽。我完全同意我们应该升级到 PHP5 - 但这是针对我工作的大公司的，正如你们许多人所知，有些事情应该发生，但不发生或不能发生。无论如何，我只是一名实习生，所以我会按照他们说的去做 =)

我想通了 -

function quoted_printable_encode($input, $line_max = 75) {                  // Quoted_printable_encode that works with php 4.x
   $hex = array('0','1','2','3','4','5','6','7', 
                          '8','9','A','B','C','D','E','F'); 
   $lines = preg_split("/(?:\r\n|\r|\n)/", $input); 
   $linebreak = "=0D=0A=\r\n"; 
   /* the linebreak also counts as characters in the mime_qp_long_line 
    * rule of spam-assassin */ 
   $line_max = $line_max - strlen($linebreak); 
   $escape = "="; 
   $output = ""; 
   $cur_conv_line = ""; 
   $length = 0; 
   $whitespace_pos = 0; 
   $addtl_chars = 0; 

   // iterate lines 
   for ($j=0; $j<count($lines); $j++) { 
     $line = $lines[$j]; 
     $linlen = strlen($line); 

     // iterate chars 
     for ($i = 0; $i < $linlen; $i++) { 
       $c = substr($line, $i, 1); 
       $dec = ord($c); 

       $length++; 

       if ($dec == 32) { 
          // space occurring at end of line, need to encode 
          if (($i == ($linlen - 1))) { 
             $c = "=20"; 
             $length += 2; 
          } 

          $addtl_chars = 0; 
          $whitespace_pos = $i; 
       } elseif ( ($dec == 61) || ($dec < 32 ) || ($dec > 126) ) { 
          $h2 = floor($dec/16); $h1 = floor($dec%16); 
          $c = $escape . $hex["$h2"] . $hex["$h1"]; 
          $length += 2; 
          $addtl_chars += 2; 
       } 

       // length for wordwrap exceeded, get a newline into the text 
       if ($length >= $line_max) { 
         $cur_conv_line .= $c; 

         // read only up to the whitespace for the current line 
         $whitesp_diff = $i - $whitespace_pos + $addtl_chars; 

        /* the text after the whitespace will have to be read 
         * again ( + any additional characters that came into 
         * existence as a result of the encoding process after the whitespace) 
         * 
         * Also, do not start at 0, if there was *no* whitespace in 
         * the whole line */ 
         if (($i + $addtl_chars) > $whitesp_diff) { 
            $output .= substr($cur_conv_line, 0, (strlen($cur_conv_line) - 
                           $whitesp_diff)) . $linebreak; 
            $i =  $i - $whitesp_diff + $addtl_chars; 
          } else { 
            $output .= $cur_conv_line . $linebreak; 
          } 

        $cur_conv_line = ""; 
        $length = 0; 
        $whitespace_pos = 0; 
      } else { 
        // length for wordwrap not reached, continue reading 
        $cur_conv_line .= $c; 
      } 
    } // end of for 

    $length = 0; 
    $whitespace_pos = 0; 
    $output .= $cur_conv_line; 
    $cur_conv_line = ""; 

    if ($j<=count($lines)-1) { 
      $output .= $linebreak; 
    } 
  } // end for 

  return trim($output); 
} // end quoted_printable_encode 

让它发挥作用。我碰巧在你们发帖后回来查看，所以不幸的是我没有测试你们的解决方案，但上面的功能运行得非常完美！

再次感谢大家！

Answer 3

您是否安装了 IMAP 模块？使用 imap_8bit() 来代替怎么样？

Answer 4

最好的办法是升级到 PHP 5.4
死了。

如果这真的、真的不是一个选项，手册页您链接到有一些替代方案（imap_8bit( ） 以及用户贡献的注释中的一些替代实现）。

Answer 5

    public function quoted_printable($mesg){
  $orders = unpack("C*", $mesg);
  unset($mesg);
  array_filter($orders, array($this, 'cb_qp'));
  return implode($orders);
}

// Quoted-Printable Callback
private function cb_qp(&$byte){
  $byte = ($byte > 126 || $byte == 61 || $byte == 37) ? sprintf('=%X', $byte) : pack("C", $byte);
}
 // http://rolfrost.de/proglog.html?d=20130324