What are the limitations of using encryption methods that do not rely on HTTPS technology for protecting sensitive data in PHP applications?

Using encryption methods that do not rely on HTTPS technology for protecting sensitive data in PHP applications can expose the data to potential security risks, such as man-in-the-middle attacks. To solve this issue, it is crucial to implement HTTPS to ensure secure communication between the client and server. 

// Implementing HTTPS in PHP application
// Redirect to HTTPS if not already using it
if ($_SERVER['HTTPS'] != 'on') {
    $redirect_url = "https://" . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'];
    header("Location: $redirect_url");
    exit();
}

Keywords

encryption HTTPS sensitive data limitations PHP applications

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