PHP code op pagina uitvoeren

Hallo,

Voor een autobedrijf moet ik PHP code integreren om advertenties (via een portal) op te halen.

Nou wil ik dit op een specifieke pagina van de site weergeven.

De code die hiervoor nodig is bevat 2 bestanden:
index.php

<?php
    error_reporting(E_ALL); ini_set("display_errors", "on");
    include_once("xml.class.php");

    //hier post informatie
    //$xmlData =  file_get_contents("php://input");

    //zo ziet de output eruit.
    $xmlData =  file_get_contents("input/xmlinput-1342704070.xml");

    $fh = fopen("input/xmlinput-" . time() . ".xml", "w");
    fwrite($fh, $xmlData);
    fclose($fh);

    $xml = new vweXML();
    $xml->setVar("XMLinput", $xmlData);
    $result = $xml->processXMLcontent();

    //$result = $xml->getResult();

    $result = $xml->getVar("XMLoutput");

    echo '<pre>';

    var_dump($result);
?>

En xml.class.php

<?php
   class vweXML
   {
      /**
       * XML input
       */
      protected $XMLinput;

      /**
       * XML output
       */
      protected $XMLoutput;

      /**
       * XMLReader object
       */
      protected $doc;

      /**
       * Last error message
       */
      protected $error;

      /**
       * Proces result
       */
      protected $result;

      /**
       * Process the XML content
       *
       * @return  void
       */
      public function processXMLcontent( )
      {
         if ( isset( $this->XMLinput ) )
         {
            if ( ! isset( $this->XMLoutput ) )
            {
                $this->doc = new XMLReader( );

                //Parse XML document
                if ( $this->doc->XML( stripslashes( $this->XMLinput ) ) )
                {
                   //Convert the document to an array
                   if ( $this->XMLoutput = $this->xml2assoc( ) )
                   {
                      $this->doc->close( );

                      return true;
                   }
                }

                $this->doc->close( );

                $this->setResult( "Incorrect XML format" );

                return false;
            }
            else
            {
                return $this->XMLoutput;
            }
         }
         else
         {
            $this->setResult( "No XML input was found" );
         }
         return false;
      }

      /**
       * XML to associative array
       *
       * @return  void
       */
      protected function xml2assoc( )
      {
         $tree = null;
         while ( $this->doc->read( ) )
         {
            switch ( $this->doc->nodeType )
            {
               case XMLReader::END_ELEMENT: return $tree;

               case XMLReader::ELEMENT:

                  $node = array(
                              'tag' => $this->doc->name,
                              'value' => $this->doc->isEmptyElement ? '' : $this->xml2assoc( $this->doc )
                           );

                  if ( $this->doc->hasAttributes )
                  {
                     while( $this->doc->moveToNextAttribute( ) )
                     {
                        $node['attributes'][ $this->doc->name ] = $this->doc->value;
                     }
                  }
                  $tree[] = $node;

                  break;
               case XMLReader::TEXT:
               case XMLReader::CDATA:
                  $tree .= $this->doc->value;
            }
         }

         return $tree;
      }

      /**
       * Retrieves a var from the object
       *
       * @param      string $var
       * @return     mixed $var
       */
      public function getVar( $var )
      {
         if ( isset( $this->$var ) )
         {
            return $this->$var;
         }

         return false;
      }

      /**
       * Sets a var in the object
       *
       * @param      string $var
       * @param      mixed $value
       * @return     bool
       */
      public function setVar( $var, $value )
      {
         if ( property_exists( $this, $var ) )
         {
            $this->$var = $value;

            return true;
         }

         return false;
      }

      /**
       * Sets result message
       *
       * @param      string $message
       */
      protected function setResult( $message )
      {
         if ( $message )
            $this->result = $message;
      }

      /**
       * Returns result
       */
      public function getResult( )
      {
         if ( isset( $this->result ) )
            return $this->result;

         return false;
      }

   }

?>

Enig idee hoe dit op een pagina te implementeren ?