MysqliConnection::getVersion

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

		preg_match("#[0-9]+\.[0-9]+\.[0-9]+#", $version, $ar);
		$this->version = $ar[0];
	}

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