What are common issues related to PHP session handling, and how can they impact the functionality of a login system?

One common issue related to PHP session handling is session fixation, where an attacker sets a user's session ID before they log in, allowing them to hijack the session. To prevent this, regenerate the session ID after a successful login using session_regenerate_id(true). 

session_start();

// Perform login process

if($login_successful){
    session_regenerate_id(true);
    // Redirect to logged-in page
}

Keywords

Session hijacking session fixation session timeout session_regenerate_id session_destroy

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