<?php
require('soap-wsse.php');

define('PRIVATE_KEY', '<private.key>');
define('CERT_FILE', '<public.crt>');

class mySoap extends SoapClient {

   function __doRequest($request, $location, $saction, $version) {
    $doc = new DOMDocument('1.0');
    $doc->loadXML($request);

    $objWSSE = new WSSESoap($doc);

    /* add Timestamp with no expiration timestamp */
     $objWSSE->addTimestamp();

    /* create new XMLSec Key using RSA SHA-1 and type is private key */
    $objKey = new XMLSecurityKey(XMLSecurityKey::RSA_SHA1, array('type'=>'private'));

    /* load the private key from file - last arg is bool if key in file (TRUE) or is string (FALSE) */
    $objKey->loadKey(PRIVATE_KEY, TRUE);

    /* Sign the message - also signs appropraite WS-Security items */
    $objWSSE->signSoapDoc($objKey);

    /* Add certificate (BinarySecurityToken) to the message and attach pointer to Signature */
    $token = $objWSSE->addBinaryToken(file_get_contents(CERT_FILE));
    $objWSSE->attachTokentoSig($token);

    return parent::__doRequest($objWSSE->saveXML(), $location, $saction, $version);
   }
}

  $client = new mySoap("http://localhost/stockquote.wsdl");
try {
  print($client->getQuote("ibm"));
} catch (Exception $e) {
	var_dump($e);
}
?>