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<?php
namespace Illuminate\Database\Connectors;
use Doctrine\DBAL\Driver\PDOConnection;
use Exception;
use Illuminate\Database\DetectsLostConnections;
use PDO;
use Throwable;
class Connector
{
use DetectsLostConnections;
/**
* The default PDO connection options.
*
* @var array
*/
protected $options = [
PDO::ATTR_CASE => PDO::CASE_NATURAL,
PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
PDO::ATTR_ORACLE_NULLS => PDO::NULL_NATURAL,
PDO::ATTR_STRINGIFY_FETCHES => false,
PDO::ATTR_EMULATE_PREPARES => false,
];
/**
* Create a new PDO connection.
*
* @param string $dsn
* @param array $config
* @param array $options
* @return \PDO
*
* @throws \Exception
*/
public function createConnection($dsn, array $config, array $options)
{
[$username, $password] = [
$config['username'] ?? null, $config['password'] ?? null,
];
try {
return $this->createPdoConnection(
$dsn, $username, $password, $options
);
} catch (Exception $e) {
return $this->tryAgainIfCausedByLostConnection(
$e, $dsn, $username, $password, $options
);
}
}
/**
* Create a new PDO connection instance.
*
* @param string $dsn
* @param string $username
* @param string $password
* @param array $options
* @return \PDO
*/
protected function createPdoConnection($dsn, $username, $password, $options)
{
if (class_exists(PDOConnection::class) && ! $this->isPersistentConnection($options)) {
return new PDOConnection($dsn, $username, $password, $options);
}
return new PDO($dsn, $username, $password, $options);
}
/**
* Determine if the connection is persistent.
*
* @param array $options
* @return bool
*/
protected function isPersistentConnection($options)
{
return isset($options[PDO::ATTR_PERSISTENT]) &&
$options[PDO::ATTR_PERSISTENT];
}
/**
* Handle an exception that occurred during connect execution.
*
* @param \Throwable $e
* @param string $dsn
* @param string $username
* @param string $password
* @param array $options
* @return \PDO
*
* @throws \Exception
*/
protected function tryAgainIfCausedByLostConnection(Throwable $e, $dsn, $username, $password, $options)
{
if ($this->causedByLostConnection($e)) {
return $this->createPdoConnection($dsn, $username, $password, $options);
}
throw $e;
}
/**
* Get the PDO options based on the configuration.
*
* @param array $config
* @return array
*/
public function getOptions(array $config)
{
$options = $config['options'] ?? [];
return array_diff_key($this->options, $options) + $options;
}
/**
* Get the default PDO connection options.
*
* @return array
*/
public function getDefaultOptions()
{
return $this->options;
}
/**
* Set the default PDO connection options.
*
* @param array $options
* @return void
*/
public function setDefaultOptions(array $options)
{
$this->options = $options;
}
}