帅码编程
编辑器
<!DOCTYPE html> <html> <body> <?php // Variable to check $url = "https://www.w3schools.com"; // Validate url if (filter_var($url, FILTER_VALIDATE_URL, FILTER_FLAG_QUERY_REQUIRED)) { echo("$url is a valid URL"); } else { echo("$url is not a valid URL"); } ?> </body> </html>
https://www.w3schools.com is not a valid URL