RSS의 새로운 한계에 도전하기 (한글)

                    
function get_elements($xml, $element,$multiple)
{
 if ($multiple) { 
       /* Return ALL matches of this element in the $xml provided. 
        * Results will be returned as an array or arrays
        */ if ($multiple) {
       $item = preg_match_all("#<$element(|[^>]*)>(.*)</$element>#msU",
                               $xml,
                              $matches,PREG_PATTERN_ORDER);
        
       /* Trim whitespace. This could've been done in the RegExp, */
       /* but you can also use PHP's trim() function for that.     */
            for ($i = 0;
             $i < count ($matches[2]);
             $i++)
            {
                $matches[2][$i] = trim ($matches[2][$i]);
             } /* end for */
           }
          else
          {
          $item = preg_match("/<$element(|[^>]*)>(.*)<\/$element>/msU",
                             $xml,
                             $matches);
          $matches[2] = trim($matches[2]);
 }

      /* 
       * When you get here, $matches is either an array of arrays, or a 
       * single array, in the following format:
       *     
       *   [0] => Entire pattern matched  
       *   [1] => "", or attributes of this element (if any) (| [^>]*)
       *   [2] => Element content (corresponding to (.*)
       * 
       * You thus choose to return [2] = Element contents, or array of  
       * matched elements' contents.
       */  
   return ($matches[2]); /* Element content */
}

                    
function get_specific_element($feed, $child, $value)
{
  $items = get_elements($feed, "item",true);
  if (!$items) { echo "What are you feeding me? No items here!\n"; 
                 return(false);}
  for ($i = 0 ; $i < count ($items);$i++){
     /* to get child elements, simply call on parent element, 
      * with child name as argument 
      */
  
   $val = (get_elements($items[$i],"$child",false)); 
   if ($val == trim($value)) {return ($items[$i]); } ;
     }
     return(false);
}

                    

$feed = get_channel ($feed_url);
$desired_child = /* Whatever, obtain from user */;
$desired_value = /* Whatever, obtain from user */;
$elem = get_specific_element($feed, 
                             $desired_child, 
                             $desired_value);

/* Have some fun with this element: */
$title = (get_elements($elem,"title",false));
$description = (get_elements($elem,"description",false));
/* do something with title and description */
      ...
/* get zero or more connections (axons) this element has ..*/
$axons = (get_elements($elem,"mesh:axon",true));

                    
function get_feed($url)
{
 /* open the feed locally */
 $fp = fopen ($url, "r");

$content = fread($fp, filesize($url));

 return ($content);
}

                    
$contacts_feed = get_feed ("simpsons_contacts.xml");
$engagements_feed = get_feed ("simpsons_engagements.xml");
$places_feed = get_feed ("simpsons_places.xml");

                    

$engs = get_elements($engagements_feed, "item",true);

foreach ($engs as $eng)
{
  $title = (get_elements($eng,"title",false));

 echo ("Got Engagement: $title\n");
}

                    
$engs = get_elements($engagements_feed, "item",true);

foreach ($engs as $eng)
{

  $title = (get_elements($eng,"title",false));

  echo ("Got Engagement: $title\n");

  $axons = (get_elements($eng,"mesh:axon",true));

  foreach ($axons as $ax)
  {
    if (strstr($ax, "Simpsons:/People")) {
      /* Lookup this person */
      $part = get_specific_element($contacts_feed,
                                   "guid",
                                   $ax);

      if (!$part) { echo ($ax . " Not found\n");}
      else {

            $title = (get_elements($part,"title",false));
            echo ("Participant: $title\n");
          }
    }
  }

                    
$contacts_feed = get_feed ("simpsons_contacts.xml");
$contacts = get_elements($contacts_feed,"item",true);
$common_axons = Array();
foreach ($contacts as $contact)
{
  $title = get_elements($contact,"title",false);
  echo ("Got contact: $title<BR/>\n");
  $axons = (get_elements($contact,"mesh:axon",true));
  foreach ($axons as $ax)
  {
    /* Lookup these axons in the $common_axons */
    $cax_count = count ($common_axons);
    for($cax_no = 0;
            $cax_no < $cax_count;
            $cax_no++)
      {
         if ($common_axons[$cax_no] == $ax)
          {
             echo ("Bingo! Commonality found: $ax\n");
             exit(0);
          }
      }
     /* Add anyway */
     $common_axons [count($common_axons)] = $ax;
  } 
} /* end foreach*/

                    
Got contact: Homer Jay Simpson
Got contact: Charles Montgomery_Burns
Bingo! Commonality found: Simpsons:/Places/Springfield_Nuclear_Power_Plant