What are the security implications of manually passing form data in PHP using $_GET or $_POST?

Passing form data manually using $_GET or $_POST in PHP can lead to security vulnerabilities such as SQL injection and cross-site scripting attacks. To prevent these issues, it is important to sanitize and validate user input before processing it in your application. 

// Example of sanitizing user input before processing it
$name = isset($_POST['name']) ? htmlspecialchars($_POST['name']) : '';
$email = isset($_POST['email']) ? filter_var($_POST['email'], FILTER_SANITIZE_EMAIL) : '';

Keywords

PHP $_GET $_POST security implications form data

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