/**
* write block to file
* @param string $positionPrefix
*/
protected function flush($positionPrefix = '')
{
// write to disk only when writeFlag was set to 1
if ($this->writeFlag) {
// Disable the file proxies so that encryption is not
// automatically attempted when the file is written to disk -
// we are handling that separately here and we don't want to
// get into an infinite loop
$position = (int) floor($this->position / $this->unencryptedBlockSize);
$encrypted = $this->encryptionModule->encrypt($this->cache, $position . $positionPrefix);
$bytesWritten = parent::stream_write($encrypted);
$this->writeFlag = false;
// Check whether the write concerns the last block
// If so then update the encrypted filesize
// Note that the unencrypted pointer and filesize are NOT yet updated when flush() is called
// We recalculate the encrypted filesize as we do not know the context of calling flush()
$completeBlocksInFile = (int) floor($this->unencryptedSize / $this->unencryptedBlockSize);
if ($completeBlocksInFile === (int) floor($this->position / $this->unencryptedBlockSize)) {
$this->size = $this->util->getBlockSize() * $completeBlocksInFile;
$this->size += $bytesWritten;
$this->size += $this->headerSize;
}
}
// always empty the cache (otherwise readCache() will not fill it with the new block)
$this->cache = '';
}
/**
* write block to file
*/
protected function flush()
{
// write to disk only when writeFlag was set to 1
if ($this->writeFlag) {
// Disable the file proxies so that encryption is not
// automatically attempted when the file is written to disk -
// we are handling that separately here and we don't want to
// get into an infinite loop
$encrypted = $this->encryptionModule->encrypt($this->cache);
parent::stream_write($encrypted);
$this->writeFlag = false;
$this->size = max($this->size, parent::stream_tell());
}
// always empty the cache (otherwise readCache() will not fill it with the new block)
$this->cache = '';
}
