#36;search, '?');
if (!is_int($d2))
{
return $string;
}

$encoding = substr($search, 0, $d2);
$search = substr($search, $d2+1);

$end = strpos($search, '?=');
if (!is_int($end))
{
return $string;
}

$encoded_text = substr($search, 0, $end);
$rest = substr($string, (strlen($preceding . $charset . $encoding . $encoded_text)+6));

switch ($encoding)
{
case 'q':
case 'q':
$encoded_text = str_replace('_', '%20', $encoded_text);
$encoded_text = str_replace('=', '%', $encoded_text);
$decoded = urldecode($encoded_text);
break;

case 'b':
case 'b':
$decoded = urldecode(base64_decode($encoded_text));
break;

default:
$decoded = '=?' . $charset . '?' . $encoding . '?' . $encoded_text . '?=';
break;
}

return $preceding . $decoded . $this->decode_mime_string($rest);
}

fun

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