How can the constructor in PHP be used effectively to avoid overwriting session data?

To avoid overwriting session data in PHP, you can use the constructor to check if the session has already been started before starting a new session. By checking if the session is already active, you can prevent overwriting existing session data. 

class SessionHandler {
    public function __construct() {
        if(session_status() == PHP_SESSION_NONE) {
            session_start();
        }
    }
}

$sessionHandler = new SessionHandler();

Keywords

constructor PHP session data overwriting avoid

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