Are there any common pitfalls to avoid when redirecting to another PHP page after login?

One common pitfall to avoid when redirecting to another PHP page after login is not properly validating user input, which can lead to security vulnerabilities such as SQL injection or cross-site scripting attacks. To mitigate this risk, always sanitize and validate user input before using it in a redirect function. 

// Validate user input before redirecting
if(isset($_POST['username']) && isset($_POST['password'])){
    $username = htmlspecialchars($_POST['username']);
    $password = htmlspecialchars($_POST['password']);

    // Perform login authentication here

    // Redirect user to another page after successful login
    header("Location: dashboard.php");
    exit();
} else {
    // Handle invalid input or authentication failure
    echo "Invalid username or password";
}

Keywords

header session authentication redirect security

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