What are the implications of using $_GET['action'] directly in the code?

Using $_GET['action'] directly in the code can pose security risks such as SQL injection or cross-site scripting attacks. To mitigate this, it's important to sanitize and validate the input before using it in your code. This can be done by using filter_input() function or validating the input against a list of allowed values. 

$action = filter_input(INPUT_GET, 'action', FILTER_SANITIZE_STRING);

// Validate the input against a list of allowed values
$allowed_actions = ['view', 'edit', 'delete'];

if (in_array($action, $allowed_actions)) {
    // Proceed with the action
} else {
    // Handle invalid action
}

Keywords

$_GET security vulnerability SQL injection data validation input sanitization

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