header("HTTP/1.1 200 OK");
header("HTTP/1.1 404 Not Found");
header("HTTP/1.1 500 Internal Server Error");
header("HTTP/1.1 301 Moved Permanently");Package/library: PHP Standard Library In PHP, the Response status codes are an essential part of managing web-based applications. A variety of PHP package libraries are available to allow developers to select the best libraries or packages suited to their requirements. Some of the commonly used packages/libraries include PHP Standard Library, Laravel, Symfony, and CakePHP.