How can warnings and notices in PHP be handled properly to prevent script termination and ensure smooth execution?

To handle warnings and notices in PHP properly and prevent script termination, you can use error handling functions like `set_error_handler()` to catch these errors and handle them gracefully. This allows you to log the errors, display a custom message, or take any other appropriate action without stopping the script execution.

// Custom error handler function to handle warnings and notices
function customErrorHandler($errno, $errstr, $errfile, $errline) {
    // Log the error or display a custom message
    error_log("Warning: $errstr in $errfile on line $errline");
}

// Set the custom error handler
set_error_handler("customErrorHandler");

// Your PHP code that may trigger warnings or notices
// For example:
echo $undefinedVariable; // This will trigger a notice