php - Can't access a session variable

Question

I'm using a session variable to keep track of the current site language, three values are possible, 1. EN, 2. RU, 3. ES.

the session variable is set initially in the config file:

$_SESSION['lang'] = 'RU';

but inside my db class I cannot access the variable. My basic understanding is that variables stored in the $_SESSION array are accessible throughout the site. so what's the problem?

Answer 1

在实例化类之前，您需要打开会话。例如：

session_start('NAME_MY_SESSION')

Answer 2

一定要session_start();在使用会话变量之前调用。