What are the potential pitfalls of constantly overwriting session values in PHP?

Constantly overwriting session values in PHP can lead to data loss or unexpected behavior in your application. To avoid this, you should always check if a session value already exists before overwriting it. 

// Check if session value exists before overwriting
if (!isset($_SESSION['key'])) {
    $_SESSION['key'] = 'value';
}

Keywords

session values overwriting PHP data loss security vulnerabilities

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