Codeigniter3 上遇到 "Message: ini_set(): A session is active. You cannot change the session module's ini settings at this time"
近日在依照一個教學在Codeigniter3 上建立一個簡單的Login Form遇到點問題。
A PHP Error was encountered
Severity: Warning
Message: ini_set(): A session is active. You cannot change the session module's ini settings at this time
Filename: Session/Session.php
Line Number: 314
Backtrace:
File: /home/content/xxx/codeigniter/ci317/application/controllers/User_authentication.php
Line: 17
Function: library
Line: 17
Function: library
File: /home/content/xxx/codeigniter/ci317/index.php
Line: 315
Function: require_once
Line: 315
Function: require_once
##############################
A PHP Error was encountered
Severity: Notice
Message: A session had already been started - ignoring session_start()
Filename: Session/Session.php
Line Number: 143
Backtrace:
File: /home/content/xxx/codeigniter/ci317/application/controllers/User_authentication.php
Line: 17
Function: library
Line: 17
Function: library
File: /home/content/xxx/codeigniter/ci317/index.php
Line: 315
Function: require_once
Line: 315
Function: require_once
##############################
原因是CI3 的Session Class重寫了並使用PHP原生的Session而該教學是以CI2來編寫的，當中一個檔案內有一句:
session_start();
所以大家會看到Error中提到"A session is active."。