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blazely at removetoemail netspace net au ¶
22 years ago
Here's a quick function to establish a connection to a web server that will time out if the connection is lost after a user definable amount of time or if the server can't be reached.



Also supports Basic authentication if a username/password is specified. Any improvements or criticisms, please email me! :-)



Returns either a resource ID, an error code or 0 if the server can't be reached at all. Returns -1 in the event that something really wierd happens like a non-standard http response or something. Hope it helps someone.



Cheers,



Ben Blazely



<?php

function connectToURL($addr, $port, $path, $user="", $pass="", $timeout="30")

{

 $urlHandle = fsockopen($addr, $port, $errno, $errstr, $timeout);

 if ($urlHandle)

 {

  socket_set_timeout($urlHandle, $timeout);

  if ($path)

  {

   $urlString = "GET $path HTTP/1.0\r\nHost: $addr\r\nConnection: Keep-Alive\r\nUser-Agent: MyURLGrabber\r\n";

   if ($user)

    $urlString .= "Authorization: Basic ".base64_encode("$user:$pass")."\r\n";

    $urlString .= "\r\n";



    fputs($urlHandle, $urlString);



    $response = fgets($urlHandle);



    if (substr_count($response, "200 OK") > 0)      // Check the status of the link

    {

     $endHeader = false;                     // Strip initial header information

     while ( !$endHeader)

     {

      if (fgets($urlHandle) == "\r\n")

       $endHeader = true;

     }



     return $urlHandle;                      // All OK, return the file handle

    }

    else if (strlen($response) < 15)                // Cope with wierd non standard responses

    {

     fclose($urlHandle);

     return -1;

    }

    else                                            // Cope with a standard error response

    {

     fclose($urlHandle);

     return substr($response,9,3);

    }

   }



   return $urlHandle;

  }

  else

  {

   return 0;

  }

 }

}

?>
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