Empty the stream and reset the internal pointer.
| public flushContents ( ) |
/**
* Takes an unencoded string and produces a string encoded according to
* RFC 2231 from it.
* @param string $string to encode
* @param int $firstLineOffset
* @param int $maxLineLength, optional, 0 indicates the default of 75 bytes
* @return string
*/
public function encodeString($string, $firstLineOffset = 0,
$maxLineLength = 0)
{
$lines = array(); $lineCount = 0;
$lines[] = '';
$currentLine =& $lines[$lineCount++];
if (0 >= $maxLineLength)
{
$maxLineLength = 75;
}
$this->_charStream->flushContents();
$this->_charStream->importString($string);
$thisLineLength = $maxLineLength - $firstLineOffset;
while (false !== $char = $this->_charStream->read(4))
{
$encodedChar = rawurlencode($char);
if (0 != strlen($currentLine)
&& strlen($currentLine . $encodedChar) > $thisLineLength)
{
$lines[] = '';
$currentLine =& $lines[$lineCount++];
$thisLineLength = $maxLineLength;
}
$currentLine .= $encodedChar;
}
return implode("\r\n", $lines);
}
/**
* Takes an unencoded string and produces a QP encoded string from it.
* QP encoded strings have a maximum line length of 76 characters.
* If the first line needs to be shorter, indicate the difference with
* $firstLineOffset.
* @param string $string to encode
* @param int $firstLineOffset, optional
* @param int $maxLineLength, optional, 0 indicates the default of 76 chars
* @return string
*/
public function encodeString($string, $firstLineOffset = 0, $maxLineLength = 0)
{
if ($maxLineLength > 76 || $maxLineLength <= 0) {
$maxLineLength = 76;
}
$thisLineLength = $maxLineLength - $firstLineOffset;
$lines = array();
$lNo = 0;
$lines[$lNo] = '';
$currentLine =& $lines[$lNo++];
$size = $lineLen = 0;
$this->_charStream->flushContents();
$this->_charStream->importString($string);
//Fetching more than 4 chars at one is slower, as is fetching fewer bytes
// Conveniently 4 chars is the UTF-8 safe number since UTF-8 has up to 6
// bytes per char and (6 * 4 * 3 = 72 chars per line) * =NN is 3 bytes
while (false !== ($bytes = $this->_nextSequence())) {
//If we're filtering the input
if (isset($this->_filter)) {
//If we can't filter because we need more bytes
while ($this->_filter->shouldBuffer($bytes)) {
//Then collect bytes into the buffer
if (false === ($moreBytes = $this->_nextSequence(1))) {
break;
}
foreach ($moreBytes as $b) {
$bytes[] = $b;
}
}
//And filter them
$bytes = $this->_filter->filter($bytes);
}
$enc = $this->_encodeByteSequence($bytes, $size);
if ($currentLine && $lineLen + $size >= $thisLineLength) {
$lines[$lNo] = '';
$currentLine =& $lines[$lNo++];
$thisLineLength = $maxLineLength;
$lineLen = 0;
}
$lineLen += $size;
$currentLine .= $enc;
}
return $this->_standardize(implode("=\r\n", $lines));
}