P - PHP learning Tool practice MCQS P1. What are the main data types in PHP? PHP supports scalar types: int, float, string, bool; compound types: array, object; and special types: null, resource. PHP is loosely typed – variables are cast automatically based on context. --- 2. What is the difference between include and require? · include emits a warning and continues execution if the file is not found. · require throws a fatal error and stops the script. Use require for critical dependencies (e.g., configuration), include for optional content. --- 3. Explain PHP superglobals. Name a few. Superglobals are built-in variables available in all scopes. Key ones: · $_GET – URL query parameters · $_POST – form data sent via HTTP POST · $_SESSION – session data · $_COOKIE – client-side cookies · $_SERVER – server and execution environment info · $_FILES – uploaded files --- 4. How do you connect to a MySQL database securely? Use PDO or MySQLi wit...