How can PHP beginners differentiate between basic tutorials that focus on functionality and more advanced tutorials that emphasize secure coding practices?

PHP beginners can differentiate between basic tutorials that focus on functionality and more advanced tutorials that emphasize secure coding practices by looking for specific topics covered in the tutorial. Basic tutorials typically cover basic syntax, variables, loops, and functions, while advanced tutorials will delve into topics such as data validation, input sanitization, SQL injection prevention, and secure authentication methods. Example code snippet for secure coding practices:

// Example of input sanitization to prevent SQL injection
$user_input = $_POST['username'];
$clean_input = mysqli_real_escape_string($connection, $user_input);
$query = "SELECT * FROM users WHERE username = '$clean_input'";
$result = mysqli_query($connection, $query);