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<?php |
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namespace DrMVC\Database\Drivers; |
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use PDO; |
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use DrMVC\Database\SQLException; |
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use DrMVC\Database\Drivers\Interfaces\DriverInterface; |
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/** |
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* Wrapper of PDO for work with MySQL/MariaDB databases |
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* |
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* @package DrMVC\Database\Drivers |
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* @since 3.0 |
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*/ |
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class Mysql extends SQL |
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{ |
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const DEFAULT_HOST = '127.0.0.1'; |
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const DEFAULT_PORT = '3306'; |
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const DEFAULT_CHARSET = 'utf8'; |
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const DEFAULT_COLLATION = 'utf8_unicode_ci'; |
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/** |
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* @link https://secure.php.net/manual/en/ref.pdo-mysql.connection.php |
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* |
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* The PDO_MYSQL Data Source Name (DSN) is composed of the following elements: |
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*/ |
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const AVAILABLE_OPTIONS = [ |
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'host', |
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'port', |
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'dbname', |
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'unix_socket' |
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]; |
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/** |
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* Generate DSN by parameters in config |
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* |
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* @param array $config |
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* @return string |
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*/ |
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public function genDsn($config): string |
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{ |
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// Parse config |
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$dsn = ''; |
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foreach ($config as $key => $value) { |
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if (\in_array($key, self::AVAILABLE_OPTIONS, false)) { |
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$dsn .= "$key=$value;"; |
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} |
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} |
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// Get driver of connection |
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$driver = strtolower($config['driver']); |
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return "$driver:$dsn"; |
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} |
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/** |
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* Initiate connection to database |
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* |
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* @return DriverInterface |
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*/ |
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public function connect(): DriverInterface |
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{ |
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try { |
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$connection = new PDO( |
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$this->getDsn(), |
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$this->getParam('username'), |
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$this->getParam('password'), |
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$this->getOptions() |
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); |
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$this->setInstance($connection); |
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} catch (SQLException $e) { |
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// __construct |
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} |
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return $this; |
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} |
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private function getOptions(): array |
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{ |
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// Current charset |
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$charset = $this->getParam('charset') ?? self::DEFAULT_CHARSET; |
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// Current collation |
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$collation = $this->getParam('collation') ?? self::DEFAULT_COLLATION; |
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// Return array of options |
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return [PDO::MYSQL_ATTR_INIT_COMMAND => "SET NAMES '$charset' COLLATE '$collation'"]; |
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} |
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} |
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drmvc /
database
