pictures from national geographic

<?php
//dab??jam no dropdown boxa xml faila linku. @ vajadz??gs, lai k????das pazi??ojumu nemet lauk??, jo pirmo reizi atverot, protams, ka
//'name'neb??s defin??ts
$xml_file=@$_POST['name'];

//skatamies, vai pirmo reizi lapa atv??rta.
if (!isset($xml_file)) {$xml_file="/your-shot/dailydozen/feed";}
//nor??dam lapu, no kuras tiks ieg??ta bil??u liste priek?? dropdown boxa
$xmlLapa="http://ngm.nationalgeographic.com/your-shot/daily-dozen/";
//nor??dam xml faila pilno atra??an??s vietu
$xml_file = "http://ngm.nationalgeographic.com".$xml_file;
//varb??t k??dam noder...
echo "<br>".$xml_file."<br><br>";

//sagrie??am un dab??jam no lapas ??r?? tie??i to, ko mums vajaga - options sada??u.
$xmlLapa = file_get_contents($xmlLapa) or die("Could not read file");
$garums = strlen($xmlLapa);
$saakums = strpos($xmlLapa, "<option");
$beigas = strpos($xmlLapa, "</select");
$options = substr($xmlLapa, $saakums, $beigas-$garums);

//nos??cam failu

//ats??cam vajadz??gos apskat??mos tegus - image, caption un yscredit
$xml_photo_key = "*PHOTOGALLERY*PHOTO*IMAGE";
$xml_caption_key = "*PHOTOGALLERY*PHOTO*CAPTION";
$xml_author_key = "*PHOTOGALLERY*PHOTO*YSCREDIT";
//defin??jam ieraksta mas??vu
$story_array = array();
//defin??jam skait??kli, kas skait??s ierakstus
$counter = 0;

//izveidojam klasi par ierakstu, kur?? main??gie ir att??ls(image), apraksts(caption) un autors
class xml_story{
    var $image, $caption, $author;
}
//klas?? ir tr??s funkcijas.
//pirm?? funkcija - starta tega atra??ana
function startTag($parser, $data){
    global $current_tag;
    $current_tag .= "*$data";
}
//otr?? funkcija - beigu tega atra??ana
function endTag($parser, $data){
    global $current_tag;
    $tag_key = strrpos($current_tag, '*');
    $current_tag = substr($current_tag, 0, $tag_key);
}
//tre???? funkcija - satura atra??ana.
function contents($parser, $data){
    global $current_tag, $xml_photo_key, $xml_caption_key, $xml_author_key, $counter, $story_array;
    switch($current_tag){

        case $xml_photo_key:
            $story_array[$counter] = new xml_story();
            $story_array[$counter]->image = $data;
            break;

        case $xml_author_key:
            $story_array[$counter]->author=$data;
            break;

        case $xml_caption_key:
            $story_array[$counter]->caption = $data;
            $counter++;
           break;

        }
}


//uztaisam xml parseri
$xml_parser = xml_parser_create();
//palai??am parseri ???
xml_set_element_handler($xml_parser, "startTag", "endTag");

xml_set_character_data_handler($xml_parser, "contents");


$fp = fopen($xml_file, "r") or die("Could not open file");
//it k?? var??tu iztikt bez file_get_contents un izmantot "fread", bet ??oreiz es pa????mu file_get_contents. $data k?? viens gar?? strings tagad.
$data = file_get_contents($xml_file) or die("Could not read file");


if(!(xml_parse($xml_parser, $data, feof($fp)))){
    die("Error on line " . xml_get_current_line_number($xml_parser));
}


xml_parser_free($xml_parser);

//fclose($fp);

?>

<html>
<head>
<title>National Geographic NGN Daily Dozen pictures</title>

<style type="text/css">


  #menu {
    position: fixed;
    _position:absolute;
    _top:expression(eval(document.body.scrollTop));
    left:800px;
    top:0px;
    background-color: #d8da3d }

  #content {
  font-family:verdana;

  font-size:11px;
  background-color: #fcfcfc
  top:0;
  right:0;
  width:60%;
  }
 </style>

</head>
<body bgcolor="#FFFFFF" >

 <div id="menu">
 <hr \>
<form action="nga.php" method="post" name="formasName">
<?php
//select teg?? iek???? javaskripts - uz izmai??u konkr??to formu izpild??t Submit komandu.
?>
<select name="name" onChange="document.forms['formasName'].submit()">
<?php
echo $options;
?>
</select>
</form>
<hr \>
</div>


 <div id="content">
<?php
//datu izvad????ana no izveidot?? mas??va.


for($x=0;$x<count($story_array);$x++){
    echo "\t<h2><img src=\"http://ngm.nationalgeographic.com" . $story_array[$x]->image . "\"></h2>\n";
    echo "\t\t\n";
    echo "\t" . $story_array[$x]->caption . "<br>\n";
    echo "\t<i>" . $story_array[$x] -> author ."</i>\n";
    echo "<hr><br>";
}


//s??k??ks klases koda apraksts ??eitan - http://www.kirupa.com/web/xml_php_parse_intermediate.htm
?>
 </div>
</body>
</html>