What are common reasons for session variables not being available on a PHP server, even though they work locally?

Common reasons for session variables not being available on a PHP server can include misconfigured server settings, disabled session support, or incorrect session.save_path. To solve this issue, you can check the PHP configuration file (php.ini) to ensure that session support is enabled and the session.save_path is set correctly. 

// Check if session support is enabled
if (session_status() == PHP_SESSION_NONE) {
    session_start();
}

Keywords

session variables PHP server server configuration session.save_path session_start

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