(PHP 5 >= 5.4.0, PHP 7, PHP 8)
SessionHandlerInterface::open — Initialize session
$path, string $name): boolRe-initialize existing session, or creates a new one. Called when a session starts or when session_start() is invoked.
pathThe path where to store/retrieve the session.
nameThe session name.
会话存储的返回值（通常成功返回 0，失败返回 1）。