Support for fwrite(), file_put_contents() etc.
Data will not be written as this is a read-only stream wrapper.
string $data: The string to be written.
bool FALSE as data will not be written.
Overrides PhpStreamWrapperInterface::stream_write
http://php.net/manual/en/streamwrapper.stream-write.php
public function stream_write($data) {
trigger_error('stream_write() not supported for read-only stream wrappers', E_USER_WARNING);
return FALSE;
}