MysqliDbConnection::getVersion

public function getVersion()
{
	if ($this->version == null)
	{
		$con = $this->getResource();

		/** @var $con mysqli */
		$version = trim($con->server_info);
		preg_match("#[0-9]+\.[0-9]+\.[0-9]+#", $version, $ar);
		$this->version = $ar[0];
	}

	return array($this->version, null);
}