具体如源码所示，黄色背景显示：
1 /** 2 * session初始化 3 * @param array $config 4 * @return void 5 * @throws \think\Exception 6 */ 7 public static function init(array $config = []) 8 { 9 if (empty($config)) { 10 $config = Config::get('session'); 11 } 12 // 记录初始化信息 13 App::$debug && Log::record('[ SESSION ] INIT ' . var_export($config, true), 'info'); 14 $isDoStart = false; 15 if (isset($config['use_trans_sid'])) { 16 ini_set('session.use_trans_sid', $config['use_trans_sid'] ? 1 : 0); 17 } 18 19 // 启动session 20 if (!empty($config['auto_start']) && PHP_SESSION_ACTIVE != session_status()) { 21 ini_set('session.auto_start', 0); 22 $isDoStart = true; 23 } 24 25 if (isset($config['prefix']) && ('' === self::$prefix || null === self::$prefix)) { 26 self::$prefix = $config['prefix']; 27 } 28 if (isset($config['var_session_id']) && isset($_REQUEST[$config['var_session_id']])) { 29 session_id($_REQUEST[$config['var_session_id']]); 30 } elseif (isset($config['id']) && !empty($config['id'])) { 31 session_id($config['id']); 32 } 33 if (isset($config['name'])) { 34 session_name($config['name']); 35 } 36 if (isset($config['path'])) { 37 session_save_path($config['path']); 38 } 39 if (isset($config['domain'])) { 40 ini_set('session.cookie_domain', $config['domain']); 41 } 42 if (isset($config['expire'])) { 43 ini_set('session.gc_maxlifetime', $config['expire']); 44 ini_set('session.cookie_lifetime', $config['expire']); 45 } 46 if (isset($config['secure'])) { 47 ini_set('session.cookie_secure', $config['secure']); 48 } 49 if (isset($config['httponly'])) { 50 ini_set('session.cookie_httponly', $config['httponly']); 51 } 52 if (isset($config['use_cookies'])) { 53 ini_set('session.use_cookies', $config['use_cookies'] ? 1 : 0); 54 } 55 if (isset($config['cache_limiter'])) { 56 session_cache_limiter($config['cache_limiter']); 57 } 58 if (isset($config['cache_expire'])) { 59 session_cache_expire($config['cache_expire']); 60 } 61 if (!empty($config['type'])) { 62 // 读取session驱动 63 $class = false !== strpos($config['type'], '\\') ? $config['type'] : '\\think\\session\\driver\\' . ucwords($config['type']); 64 65 // 检查驱动类 66 if (!class_exists($class) || !session_set_save_handler(new $class($config))) { 67 throw new ClassNotFoundException('error session handler:' . $class, $class); 68 } 69 } 70 if ($isDoStart) { 71 session_start(); 72 self::$init = true; 73 } else { 74 self::$init = false; 75 } 76 }
所以，只需要config.php中这样配置即可，亲测可用
