/**
* Initalizes this class, so a connection can be made to the database. The first argument is a
* url. If url is not null, the connection parameters will be decoded from the url.
*
* The provided url will contain the username, password, hostname, port, and the database name.
* Take the following url for example.
*
* root:secret@mysql.example.com:3603/administration
*
* It will connect to mysql.example.com at port 3603. It will use the username root, and use
* the password secret. The database is named administration.
* Please note that the scheme and fragment will be ignored.
*
* @param string|null $url
*/
public function __construct($url = null)
{
if (null !== $url) {
if (!filter_var($url, \FILTER_VALIDATE_URL)) {
$url = 'mysql://' . $url;
}
$parsed = parse_url($url);
if (isset($parsed['host'])) {
$this->host = $parsed['host'];
}
if (isset($parsed['port'])) {
$this->port = $parsed['port'];
}
if (isset($parsed['user'])) {
$this->username = $parsed['user'];
}
if (isset($parsed['pass'])) {
$this->password = $parsed['pass'];
}
if (isset($parsed['path'])) {
$this->databaseName = trim($parsed['path'], '/');
}
}
parent::__construct();
}
/**
* Creates a new PDODatabase with the "Data Source Name", username, password, and extra options.
*
* The arguments MUST be compatiable with the PDO constructor.
*
* @param string $dsn
* @param string|null $username
* @param string|null $password
* @param array $options
*/
public function __construct($dsn, $username = null, $password = null, array $options = [])
{
$this->dsn = $dsn;
$this->username = $username;
$this->password = $password;
$this->options = $options;
parent::__construct();
}