Message: Session: Configured save path '/usr/share/nginx/html/terminal_php/application/../sesssion_files' is not writable by the PHP process.
Filename: /usr/share/nginx/html/terminal_php/system/libraries/Session/drivers/Session_files_driver.php
Severity: Warning
Message: fopen(1f194f2bef7c1013a926c931c860a0eb62071b84): failed to open stream: Permission denied
Filename: drivers/Session_files_driver.php
原因： 访问Session_files_driver.php该文件的权限不够，因为sesssion_files该文件夹内是储存session的文件，然而每次用户访问都会进行动态生成session的写入、读取和执行，因此，只要设置好“读、写、执行”权限即可。