Support for fread(), file_get_contents() etc.
int $count: Maximum number of bytes to be read.
string|bool The string that was read, or FALSE in case of an error.
Overrides PhpStreamWrapperInterface::stream_read
http://php.net/manual/streamwrapper.stream-read.php
public function stream_read($count) {
return fread($this->handle, $count);
}