PHP4: How to fax a binary file

<?
/**
* Send a Fax using PHP/PEAR::SOAP Example:
* - Using SendfaxEx() Method from InterFax Web Services
*/
/**
* Your variables go here - assign a value to each one
*/
$username = "";
$password = "";
$faxnumber = "";  // formatted like +13055551234, i.e. +(country code)(area code)(phone number)
$file = ""; // binary file to fax
$filetype = ""; //e.g. HTML, DOC, PDF, etc.; see documentation for complete list
$postponetime = "";  //e.g. 2001-04-25T20:31:00-04:00, use a past date/time to fax immediately
$resolution = ""; // 0 for standard, 1 for fine
$csid = ""; // your fax identifier, visible on the receiving machine's little screen
$subject = ""; // for your reference, visible in the outbound queue
$replyemail = ""; //optional address at which to receive an emailed confirmation
 
/**
* PEAR::SOAP class [http://pear.php.net/package/SOAP]
*/
require_once 'SOAP/Client.php';
 
// Open File
if( !($fp = fopen($file, "r")))
{
// Error opening file
// Handle error how it is appropriate for your script
exit;
}
 
// Read data from the file into $data
$data = "";
while (!feof($fp)) $data .= fread($fp,1024);
 
// URL path to InterFax Web Services
$wsdl_url = 'http://ws.interfax.net/dfs.asmx?wsdl';
 
// Create an instance of the SOAP_WSDL class
$WSDL = new SOAP_WSDL($wsdl_url);
 
/**
* This function creates a proxy to the SOAP services
* so that you can access the InterFax methods directly
* as if you were calling a local function
*/
$client = $WSDL->getProxy();
 
/**
* Invoke the InterFax SendfaxEx Method
* NOTE: 'base64_encode' is a native method in PHP [http://www.php.net/manual/en/function.base64-encode.php]
*/
$result = $client->SendfaxEx($username, $password, $faxnumber, base64_encode($data), $filetype, strlen($data), $postponetime, $resolution, $csid, $subject, $replyemail);
 
// Echo Result
if($result > 0) echo "Fax submitted. Transaction ID: $result";
else echo "Error sending fax. Return code: $result";
?>