Задача Жадыры[core.php]

<?php
  define('WORK_FILE','detali.xml');

  if ( !file_exists(WORK_FILE) ):
    $domDoc = new DOMDocument;
    $domDoc->appendChild($domDoc->CreateElement('produkcia'));
    $domDoc->Save(WORK_FILE);
  endif;

  function GetLastID() {
    $domDoc = new DOMDocument;
    $domDoc->formatOutput = true;
    $domDoc->Load(WORK_FILE);

    $domDetals = $domDoc->GetElementsByTagName('detal');
    $LastID = 0;
    foreach ($domDetals as $Detal)
      $LastID = $Detal->getAttribute('id');

    return $LastID;
  }

  function AddDetal($Name, $VremyaIzgotovlenya, $Razmer, $Cena) {
    $domDoc = new DOMDocument;
    $domDoc->formatOutput = true;

    $domDoc->Load(WORK_FILE);

    $domRoot = $domDoc->GetElementsByTagName('produkcia');

    $domDetal = $domDoc->CreateElement('detal');
    $attrID = $domDoc->createAttribute('id');
    $attrID->value = GetLastID()+1;
    $domDetal->setAttributeNode($attrID);
    $domDetal->appendChild($domDoc->CreateElement('name',$Name));
    $domDetal->appendChild($domDoc->CreateElement('vr_izg',$VremyaIzgotovlenya));
    $domDetal->appendChild($domDoc->CreateElement('razmer',$Razmer));
    $domDetal->appendChild($domDoc->CreateElement('cena',$Cena));

    $domRoot[0]->appendChild($domDetal);

    $domDoc->Save(WORK_FILE);
  }

  function ChangeDetalInfo($ID, $Name, $VremyaIzgotovlenya, $Razmer, $Cena) {
    $domDoc = new DOMDocument;
    $domDoc->Load(WORK_FILE);

    $domDetals = $domDoc->GetElementsByTagName('detal');
    foreach ($domDetals as $Detal) {
      if ( $Detal->getAttribute('id') == $ID ){
        $xmlDetal = simplexml_import_dom($Detal);

        $xmlDetal->name = $Name;
        $xmlDetal->vr_izg = $VremyaIzgotovlenya;
        $xmlDetal->razmer = $Razmer;
        $xmlDetal->cena = $Cena;

        $Detal = $domDoc->importNode(dom_import_simplexml($xmlDetal),true);
      }
    }

    $domDoc->formatOutput = true;
    $domDoc->Save(WORK_FILE);
  }

  function DeleteDetal($ID) {
    $domDoc = new DOMDocument;
    $domDoc->Load(WORK_FILE);

    $domRoot = $domDoc->GetElementsByTagName('produkcia');
    $domRoot = $domRoot[0];

    $domDetals = $domDoc->GetElementsByTagName('detal');
    foreach ($domDetals as $Detal)
      if ( $Detal->getAttribute('id') == $ID )
        $DetalNode = $Detal;

    if ( isset($DetalNode) )
      $domRoot->removeChild($DetalNode);

    $domDoc->formatOutput = true;
    $domDoc->Save(WORK_FILE);
  }
?>