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<?php
/**
* Generic interface for reading Isis databases.
*/
interface IsisDb {
/**
* Constructor.
*
* The implementation constructor should accept a database
* schema definition and setup the appropriate db resource.
*
* @param $schema
* High level database schema description.
*
* @return
* Database resource or FALSE in case of error.
*
* @see default_schema()
*/
public function __construct($schema);
/**
* Read an entry from the database.
*
* @param $id
* Database entry id.
*/
public function read($id);
/**
* Return number of entries in the database.
*
* @return
* Number of entries in the database.
*/
public function entries();
/**
* Return an example database schema.
*
* The example schema should have all information the implementation
* needs to be able to open and read a database.
*
* @return
* Array with a sample database schema.
*/
public function example();
/**
* Configuration check.
*
* @param $schema
* Database schema to check.
*
* @param $section
* Configuration section.
*
* @return
* Database schema or FALSE if error.
*/
static function check($schema, $section = NULL);
}
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