function check_link($link) {
	$main = array();
	$ch = curl_init();
	curl_setopt ($ch, CURLOPT_URL, $link);
	curl_setopt ($ch, CURLOPT_HEADER, 1);
	curl_setopt ($ch, CURLOPT_NOBODY, 1);
	curl_setopt ($ch, CURLOPT_FOLLOWLOCATION, 1);
	curl_setopt ($ch, CURLOPT_NETRC, 1);
	curl_setopt ($ch, CURLOPT_TIMEOUT, 10);
	ob_start();
	curl_exec ($ch);
	$stuff = ob_get_contents();
	ob_end_clean();
	curl_close ($ch);
	$parts = split("n",$stuff,2);
	$main = split(" ",$parts[0],3);

	return $main;
}

	if($retval[1]>399 || $retval[1]<1){
		$validity="Invalid";
	}else{
		$validity="Valid";
	}