php a XML

<?
  $nas_soubor="kniha.xml";
  $jeprijem=false;
  $znacka="";
  $bilance=0;

  //co se má stát, když narazíme na počáteční a koncovou značku
  function PocatecniZnacka ($parser, $nazev, $atributy)
  {
    global $znacka;
    global $jeprijem;
    $znacka=$nazev;
    if ($znacka=="PRIJEM") $jeprijem=true;
    if ($znacka=="VYDAJ") $jeprijem=false;
  }

  function KoncovaZnacka ($parser, $nazev) {};
 
  function data ($parser, $data)
  {
    global $znacka;
    global $bilance;
    global $jeprijem;
    if ($znacka=="CASTKA" and $jeprijem) echo $data;
    if ($znacka=="CASTKA" and !$jeprijem) $bilance-=$data;
   
    if ($znacka=="TITLE") echo "[$data]";
    if ($znacka=="AUTHOR") echo "[$data]";
  }
 
  $nas_parser=xml_parser_create(); 
  xml_set_element_handler ($nas_parser, "PocatecniZnacka", "KoncovaZnacka");
  xml_set_character_data_handler($nas_parser, "data");
  // fáze 3) vlastní čtení souboru, práce s ním a ukončení parseru
  if (!($obsahsouboru = fopen($nas_soubor, "r")))
    die("Nemohu otevřít XML pro čtení.");

  while ($data = fread($obsahsouboru, 1024))
    xml_parse($nas_parser, $data, feof($obsahsouboru));

  xml_parser_free($nas_parser);
 // echo $bilance;

?>

<?xml version="1.0" ?>

<books>
 <book>
  <title>The Grapes of Wrath</title>
  <author>John Steinbeck</author>
 </book>
 <book>
  <title>The Pearl</title>

  <author>John Steinbeck</author>
 </book>
 <book>
   <title>PHP de Luxe</title>
   <author>Richard Samar, Christian Stocker</author>
 </book>
 </books>

[The Grapes of Wrath][ ][John Steinbeck][ ][ ][The Pearl][ ][John Steinbeck][ ][ ][PHP de Luxe][ ][Richard Samar, Christian Stocker][ ][ ]

$data = trim($data);

$xml = simplexml_load_file('tvoj_xml.subor');
foreach($xml->books->childrens() as $child) {
        echo $child->author . ' - ' . $child->title . '<br />';
}

<?
$xml = simplexml_load_file('kniha.xml');
foreach($xml->books->book() as $child) {
        echo $child->author . ' - ' . $child->title . '<br />';
}
?>

<?
$xml = simplexml_load_file('kniha.xml');
foreach($xml->books->book as $child) {
        echo $child->author . ' - ' . $child->title . '<br />';
}
?>

<?
$xml = simplexml_load_file('kniha.xml');
foreach(($xml->books->book) as $child) {
        echo $child->author . ' - ' . $child->title . '<br />';
}
?>

<?
$xml = simplexml_load_file('kniha.xml');
foreach(($xml->book) as $child) {
        echo $child->author . ' - ' . $child->title . '<br />';
}
?>

<?php
$xml = simplexml_load_file('kniha.xml');
foreach($xml as $book) {
        echo $book->author.' - '.$book->title . '<br />';
}
?>

$xml = simplexml_load_file('kniha.xml');
foreach($xml->books->children() as $child) {
        echo $child->author . ' - ' . $child->title . '<br />';
}

<?php
$xml = simplexml_load_file('http://www.nieco.sk/generujxml.php?link=0e041cgd465fg');
foreach($xml as $produkt) {
        echo $produkt->Cennik->product->cena.' - '.$produkt->Cennik->product->nazov. '<br />';
}
?>

<Cennik>
 <product>
  <cena>500</cena>
  <nazov>Koleso</nazov>
 </product>
 <product>
  <cena>1500</cena>
  <nazov>Koberec</nazov>
 </product>
</Cennik

foreach($xml->product as $produkt) {
        echo $produkt->cena.' - '.$produkt->nazov. '<br />';
}

count($xml->product)

$xml = simplexml_load_file('http://www.nieco.sk/generujxml.php?link=0e041c1fgvbdfgdfg');
$pocet=count($xml->product);
echo "Počet produktov: ".$pocet."<br />";
foreach($xml->product as $produkt) {
        echo $produkt->cena.' - '.$produkt->nazov. '<br />';
}