How can PHP code stored in a MySQL database be accessed and executed securely?

Storing PHP code in a MySQL database can pose a security risk if not handled properly, as it opens the door to potential code injection attacks. To securely access and execute PHP code stored in a MySQL database, it is recommended to retrieve the code from the database and then use functions like "eval()" or "include()" to execute it. However, it is crucial to sanitize and validate the retrieved code to prevent any malicious code execution.

// Retrieve PHP code from the MySQL database
$code = "SELECT php_code FROM code_table WHERE id = 1";
// Sanitize and validate the retrieved code
$validated_code = validate_code($code);
// Execute the PHP code
eval($validated_code);