curltest.php

<?php

       if (isDEVAvailible('http://premium.wpmudev.org'))
       {
               echo "<h1>premium.wpmudev.org is Up and running!</h1>";
       }
       else
       {
               echo "<h1>Woops, nothing found at premium.wpmudev.org.</h1>";
       }

       //returns true, if domain is availible, false if not
       function isDEVAvailible($domain)
       {
               //check, if a valid url is provided
               if(!filter_var($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;
       }
       if (isGoogleAvailible('http://google.com'))
       {
               echo "<h1>google.com is Up and running!</h1>";
       }
       else
       {
               echo "<h1>Woops, nothing found at google.com.</h1>";
       }

       //returns true, if domain is availible, false if not
       function isGoogleAvailible($domain)
       {
               //check, if a valid url is provided
               if(!filter_var($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;
       }