Method stream_write

/**
 * Write stream
 *
 * @param   string  $data  The data to write to the stream.
 *
 * @return  integer
 *
 * @see     streamWrapper::stream_write
 * @since   1.7.0
 */
public function stream_write($data)
{
    $left = substr($this->buffers[$this->name], 0, $this->position);
    $right = substr($this->buffers[$this->name], $this->position + \strlen($data));
    $this->buffers[$this->name] = $left . $data . $right;
    $this->position += \strlen($data);
    return \strlen($data);
}