How do I use $_POST to handle form submissions in a secure way?

To handle form submissions securely with $_POST, consider the following practices:

• Use HTTPS: Ensure that your form is submitted over HTTPS to encrypt data in transit.
• Validate and sanitize inputs: Always validate and sanitize data using functions like filter_var and htmlspecialchars to prevent security vulnerabilities.
• Use prepared statements: For database interactions, use prepared statements to prevent SQL injection.
• Implement CSRF protection: Use tokens to protect against Cross-Site Request Forgery. You can generate and validate CSRF tokens using PHP sessions.