Online PHP editor | output for oX2as

<?php $urls = [ 'https://example.com/api/', 'https://www.example.com/test-subpath', 'https://www.example.com', 'example.com/test/page', 'www.example.com', 'www.subdomain.example.com', 'https://www.subdomain.example.com', 'subdomain.example.com', 'http://subdomain.example.com', 'https://subdomain.example.com', ]; function checkUrl(string $url): bool { return (bool)filter_var($url, FILTER_VALIDATE_URL); } foreach ($urls as $url) { if (checkUrl($url)) { echo $url . ' is a valid URL' . PHP_EOL; continue; } $urlWithProtocol = 'https://' . $url; if (checkUrl($urlWithProtocol)) { echo $urlWithProtocol . ' with added protocol is a valid URL' . PHP_EOL; continue; } echo $url . ' is not a valid URL' . PHP_EOL; }