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解码mime邮件的代码

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发表于 2010-2-24 13:36:34 | 显示全部楼层 |阅读模式
<br>                   function decode_mime_string ($string) { <BR>   $pos = strpos($string, '=?'); <BR>   if (!is_int($pos)) { <BR>     return $string; <BR>   } <BR>    <BR>   $preceding = substr($string, 0, $pos); // save any preceding text <BR>    <BR>   $search = substr($string, $pos+2, 75); /* the mime header spec says this is the longest a single encoded word can be */ <BR>   $d1 = strpos($search, '?'); <BR>   if (!is_int($d1)) { <BR>     return $string; <BR>   } <BR>    <BR>   $charset = substr($string, $pos+2, $d1); <BR>   $search = substr($search, $d1+1); <BR>    <BR>   $d2 = strpos($search, '?'); <BR>   if (!is_int($d2)) { <BR>     return $string; <BR>   } <BR>    <BR>   $encoding = substr($search, 0, $d2); <BR>   $search = substr($search, $d2+1); <BR>    <BR>   $end = strpos($search, '?='); <BR>   if (!is_int($end)) { <BR>     return $string; <BR>   } <BR>    <BR>   $encoded_text = substr($search, 0, $end); <BR>   $rest = substr($string, (strlen($preceding . $charset . $encoding . $encoded_text)+6)); <BR>    <BR>   switch ($encoding) { <BR>   case 'Q': <BR>   case 'q': <BR>     $encoded_text = str_replace('_', '%20', $encoded_text); <BR>     $encoded_text = str_replace('=', '%', $encoded_text); <BR>     $decoded = urldecode($encoded_text); <BR>      <BR>     if (strtolower($charset) == 'windows-1251') { <BR>       $decoded = convert_cyr_string($decoded, 'w', 'k'); <BR>     } <BR>     break; <BR>      <BR>   case 'B': <BR>   case 'b': <BR>     $decoded = urldecode(base64_decode($encoded_text)); <BR>      <BR>     if (strtolower($charset) == 'windows-1251') { <BR>       $decoded = convert_cyr_string($decoded, 'w', 'k'); <BR>     } <BR>     break; <BR>      <BR>   default: <BR>     $decoded = '=?' . $charset . '?' . $encoding . '?' . $encoded_text . '?='; <BR>     break; <BR>   } <BR>    <BR>   return $preceding . $decoded . decode_mime_string($rest); <BR>} // decode_mime_string()                   <br><br>
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