PHPAndrei

<?php

function isDomainAvailable($domain)
       {
               //check, if a valid url is provided
               if(!filter_var($domain, FILTER_VALIDATE_URL))
               {
                       return false;
               }

               //initialize curl
               $curlInit = curl_init($domain);
               curl_setopt($curlInit,CURLOPT_CONNECTTIMEOUT,10);
               curl_setopt($curlInit,CURLOPT_HEADER,true);
               curl_setopt($curlInit,CURLOPT_NOBODY,true);
               curl_setopt($curlInit,CURLOPT_RETURNTRANSFER,true);

               //get answer
               $response = curl_exec($curlInit);

               curl_close($curlInit);

               if ($response) return true;

               return false;
     }



$file = fopen("sites.txt", "r");
$sites = array();

while (!feof($file)) {
   $sites[] = fgets($file);
}

fclose($file);

foreach ($sites as $value) {

   echo "$value <br>";

  if(!strstr($value, "http://") && !strstr($value, "https://"))
    {
      $value = "http://" . $value;
    }
       if (isDomainAvailable($value))
       {
               header("Location: $value");

       }
       else
       {
               echo "Woops, nothing found there. </br>";
       }

    }


?>