/**
* @brief connects to the database
* @returns true if connection can be established or nothing (die())
*
* Connects to the database as specified in config.php
*/
public static function connect($backend = null)
{
if (self::$connection) {
return;
}
if (is_null($backend)) {
$backend = self::getDBBackend();
}
if ($backend == self::BACKEND_PDO) {
self::connectPDO();
self::$connection = self::$PDO;
self::$backend = self::BACKEND_PDO;
} else {
self::connectMDB2();
self::$connection = self::$MDB2;
self::$backend = self::BACKEND_MDB2;
}
}
