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<?php
/*
* SCROTT IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* For more information, please refer to UNLICENSE
*/
/* Include database configuration file if it exists */
define("DATABASE_CONFIG_FILE", "dbconfig.php");
is_file(DATABASE_CONFIG_FILE) && require_once DATABASE_CONFIG_FILE;
/*
* This class provides a common interface to various database drivers.
* Scrott provides facilities for interacting with any DBMS that we can
* use in PHP. To provide support for a new DBMS, extend this class and
* implement the abstract functions. Additionally, update the getInstance()
* function in this class so that the new implementation is used under
* appropriate configuration.
*/
abstract class database
{
private static $instance = NULL;
/*
* Call this object's close function while being destructed
*/
public function __destruct()
{
$this->_close();
}
/*
* Return the database instance object, creating it if this is the
* first call to this function. This function will need maintained
* as new DBMSs are supported.
*/
private static function getInstance() : database
{
// TODO
}
/*
* These functions are to be implemented by DBMS extensions,
* providing a uniform interface to database engines.
*/
protected abstract function _close() : void;
protected abstract function _query(string $query) : array;
protected abstract function _esc(string $str) : string;
/*
* Perform a database query and return the results as an array
* of arrays.
*/
public static function query(string $query) : array
{
return self::getInstance()->_query($query);
}
/*
* Escape a given string for use in a database query
*/
public static function esc(string $str) : string
{
return self::getInstance()->_esc($str);
}
}
?>
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