http_response_code alternative for PHP. Found here: http://php.net/manual/en/function.http-response-code.php#107261

http_response_code_alt.php

function http_response_code($code = NULL) {

	if ($code !== NULL) {

		switch ($code) {
			case 100: $text = 'Continue'; break;
			case 101: $text = 'Switching Protocols'; break;
			case 200: $text = 'OK'; break;
			case 201: $text = 'Created'; break;
			case 202: $text = 'Accepted'; break;
			case 203: $text = 'Non-Authoritative Information'; break;
			case 204: $text = 'No Content'; break;
			case 205: $text = 'Reset Content'; break;
			case 206: $text = 'Partial Content'; break;
			case 300: $text = 'Multiple Choices'; break;
			case 301: $text = 'Moved Permanently'; break;
			case 302: $text = 'Moved Temporarily'; break;
			case 303: $text = 'See Other'; break;
			case 304: $text = 'Not Modified'; break;
			case 305: $text = 'Use Proxy'; break;
			case 400: $text = 'Bad Request'; break;
			case 401: $text = 'Unauthorized'; break;
			case 402: $text = 'Payment Required'; break;
			case 403: $text = 'Forbidden'; break;
			case 404: $text = 'Not Found'; break;
			case 405: $text = 'Method Not Allowed'; break;
			case 406: $text = 'Not Acceptable'; break;
			case 407: $text = 'Proxy Authentication Required'; break;
			case 408: $text = 'Request Time-out'; break;
			case 409: $text = 'Conflict'; break;
			case 410: $text = 'Gone'; break;
			case 411: $text = 'Length Required'; break;
			case 412: $text = 'Precondition Failed'; break;
			case 413: $text = 'Request Entity Too Large'; break;
			case 414: $text = 'Request-URI Too Large'; break;
			case 415: $text = 'Unsupported Media Type'; break;
			case 500: $text = 'Internal Server Error'; break;
			case 501: $text = 'Not Implemented'; break;
			case 502: $text = 'Bad Gateway'; break;
			case 503: $text = 'Service Unavailable'; break;
			case 504: $text = 'Gateway Time-out'; break;
			case 505: $text = 'HTTP Version not supported'; break;
			default:
				exit('Unknown http status code "' . htmlentities($code) . '"');
				break;
		}

		$protocol = (isset($_SERVER['SERVER_PROTOCOL']) ? $_SERVER['SERVER_PROTOCOL'] : 'HTTP/1.0');

		header($protocol . ' ' . $code . ' ' . $text);

		$GLOBALS['http_response_code'] = $code;

	} else {

		$code = (isset($GLOBALS['http_response_code']) ? $GLOBALS['http_response_code'] : 200);

	}

	return $code;

}