What are the implications of PHP configuration settings like register_globals and safe_mode on database queries and data retrieval?

The implications of PHP configuration settings like register_globals and safe_mode on database queries and data retrieval can lead to security vulnerabilities and unpredictable behavior. It is recommended to disable register_globals and safe_mode to ensure proper handling of database queries and data retrieval.

// Disable register_globals and safe_mode in PHP configuration
ini_set('register_globals', 0);
ini_set('safe_mode', 0);