PHP | Website Validation Function

Could you clarify what type of website validation function you need in PHP? Are you looking for:

✅ URL validation (checking if a URL is valid)
✅ Domain validation (checking if a domain exists)
✅ Form input validation (ensuring users enter a valid website in a form)
✅ Server-side HTTP status check (checking if a website is online or returning a specific response)

Let me know your specific requirement, and I'll provide you with a proper PHP validation function!

function validate_web($input_web)
   {  
   $input_web = preg_match("/\b(?:(?:https?|ftp):\/\/|www\.)[-a-z0-9+&@#\/%?=~_|!:,.;]*[-a-z0-9+&@#\/%=~_|]/i", $input_web);
   $input_web = trim($input_web);  
            $input_web = htmlspecialchars($input_web);  
            $input_web = stripcslashes($input_web);
   return $input_web;
   }