PHP OOP – Config INI

; This is a sample configuration file
; Comments start with ';', as in php.ini

[DB_CREDENTIALS]
driver = mysql
host = localhost
db_name = mydb123
db_user = user
db_password = pass

class ConfigINI {

    public static $iniPath = __DIR__ . "/config.ini";

    public static function getPDOCredentials(){
        $ini_array = parse_ini_file(static::$iniPath, true);
        return $ini_array['DB_CREDENTIALS'];
    }
}

class PDOConnection {

    //(...)

    public function connect(): PDOConnection{
        try {
            $this->credentials = ConfigINI::getPDOCredentials();
            if(!static::hasRequiredKeys($this->credentials))
                throw new Error("Credentials dont have valid keys");
            $parsed = static::parseCredentials($this->credentials);
            $this->connection = new PDO(...$parsed);
        } catch (Exception $e) {
            echo $e->getMessage();
        }
        
        return $this;
    }

    //(...)

}
$conn = new PDOConnection();
$conn->connect();
$conn = $conn->getConnection();