function get_value()
{
$quote = substr($this->data, $this->position, 1);
if ($quote === '"' || $quote === "'") {
$this->position++;
$len = strcspn($this->data, $quote, $this->position);
if ($this->has_data()) {
$value = substr($this->data, $this->position, $len);
$this->position += $len + 1;
return $value;
}
}
return false;
}