说明：

CodeIgniter 4会话首选项
如果sessionExpiration被设置为0，PHP在会话管理中设置的session.gc_maxlifetime设置将被原样使用（通常是1440的默认值）。这需要根据需要在php.ini中或通过ini_set()进行更改。
摘录自php.ini文件（会话.cookie_寿命）

; Lifetime in seconds of cookie or, if 0, until browser is restarted.
; https://php.net/session.cookie-lifetime
session.cookie_lifetime = 0

摘录自php.ini文件（会话.gc-maxlifetime）

; After this number of seconds, stored data will be seen as 'garbage' and
; cleaned up by the garbage collection process.
; https://php.net/session.gc-maxlifetime
session.gc_maxlifetime = 1440

; NOTE: If you are using the subdirectory option for storing session files
;       (see session.save_path above), then garbage collection does *not*
;       happen automatically.  You will need to do your own garbage
;       collection through a shell script, cron entry, or some other method.
;       For example, the following script is the equivalent of setting
;       session.gc_maxlifetime to 1440 (1440 seconds = 24 minutes):
;          find /path/to/sessions -cmin +24 -type f | xargs rm

溶液：

由于您通常无法访问shared web hosting services上的php.ini文件来配置session.gc_maxlifetime，因此直接在项目根路径下的.env文件中进行设置会更方便。例如：
代替：

app.sessionExpiration = 0 ❌

使用此选项：

• 时间以秒为单位。86400 = 24小时。*

app.sessionExpiration = 86400 ✅
cookie.expires = 86400