How can the use of eval() in PHP be optimized to prevent security vulnerabilities?

Using eval() in PHP can introduce security vulnerabilities as it allows executing arbitrary code. To prevent these vulnerabilities, it's recommended to avoid using eval() whenever possible. If eval() must be used, ensure that input data is properly sanitized and validated before passing it to eval() to prevent code injection attacks.

$code = "echo 'Hello, World!';";
eval($code); // Avoid using eval() whenever possible