title: PHP class not found, creating XML document from scratch
body: <p>I'm trying to complete an example from php.net (code below) which allows you to create a SDO data graph and save it to an XML string.</p>
  
  <pre><code>&lt;?php
  /**
   * Create an XML document from scratch
   */
  try {
     $xmldas = SDO_DAS_XML::create("letter.xsd");
     try {
         $doc = $xmldas-&gt;createDocument();
         $rdo = $doc-&gt;getRootDataObject();
         $seq = $rdo-&gt;getSequence();
         $seq-&gt;insert("April 09, 2005", NULL, 'date');
         $seq-&gt;insert("Acme Inc. ", NULL, NULL);
         $seq-&gt;insert("United Kingdom. ");
         $seq-&gt;insert("Dear", NULL, NULL);
         $seq-&gt;insert("Tarun", NULL, "firstName");
         $seq-&gt;insert("Nayaraaa", NULL, "lastName");
         $rdo-&gt;lastName = "Nayar";
         $seq-&gt;insert("Please note that your order number ");
         $seq-&gt;insert(12345);
         $seq-&gt;insert(" has been dispatched today. Thanks for your business with us.");
         print($xmldas-&gt;saveString($doc));
     } catch (SDO_Exception $e) {
         print($e);
     }
  } catch (SDO_Exception $e) {
     print("Problem creating an XML document: " . $e-&gt;getMessage());
  }
  ?&gt;
  </code></pre>
  
  <p>When I try to run the code I am getting the following error:</p>
  
  <p><code>Fatal error: Class 'SDO_DAS_XML' not found in C:\xampp\htdocs\test.php on line 6</code></p>