The DOM Model Page 38

Now we repeat this same pattern for the remainder of the nodes under Travelpackage that we want to display as HTML. The second XPath statement //Travelpackage[@name="a"]/* finds all the children of Travelpackage where name="a" and stores the result back into $tmpArray.

Again we print out the values to the browser by looping through the array with a while statement:

          $path = xpath_eval($context, 
                        "//Travelpackage[@name=\"$var[$x]\"]/*");
          $tmpArray = $path->nodeset;
          while (list() = each($tmpArray)) {
              $i++;
              echo("<tr><td>");
              echo($tmpArray[$i]->name); 
              echo("</td><td>");
              echo($tmpArray[$i]->content);
              echo("</td></tr>\n");
          }
          $i=0;

The next XPath statement //Travelpackage[@name="a"]/Package/* finds all the children of Package where Travelpackage name = "a". Again the nodes that are found when evaluating the XPath statement are stored in $tmpArray. Rather than looping through the array, we reference the elements of the array directly:

          $path = xpath_eval($context, 
                        "//Travelpackage[@name=\"$var[$x]\"]/Package/*");
          $tmpArray = $path->nodeset;
          echo("<tr><td>");
          echo($tmpArray[0]->name);
          echo("</td><td>");
          echo($tmpArray[0]->content);
          echo("</td></tr>\n");
          echo("<tr><td>");
          echo($tmpArray[1]->name);
          echo("</td><td>");
          echo($tmpArray[1]->content);
          echo("</td></tr>\n");
          echo("<tr><td colspan=2><hr></td></tr>\n");
      }
      ?>
    </table>
  </body>
</html>

If the XML document was more than two conceptual recordsets long then we would have to increase the size of the $var array to account for the different size. Of course this means that we have to know the size of the XML file. If you don't know the size of the XML document or it varies in size then we need to use a sizeof() function on $tmpArray.

This figure shows the output of the above code:

The DOM Model Page 37
Professional PHP4 Programming
The RAX Model Page 39