What are best practices for naming session variables and ensuring their content is accurately checked and maintained in PHP scripts?

When naming session variables in PHP scripts, it is best practice to use descriptive and unique names to avoid conflicts with other variables. Additionally, always validate and sanitize the content of session variables to prevent security vulnerabilities such as injection attacks. Regularly check and maintain the content of session variables to ensure data integrity and security. 

// Naming session variables with descriptive and unique names
$_SESSION['user_id'] = $user_id;

// Validating and sanitizing session variable content
$_SESSION['username'] = filter_var($_POST['username'], FILTER_SANITIZE_STRING);

// Checking and maintaining session variable content
if(isset($_SESSION['user_id'])){
    // Perform actions based on user_id
}

Keywords

session variables naming conventions data validation security measures error handling

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