help - php search XML

I have the following code developed but not complete as I'm quite beginner for PHP. the code prints the results as shown in the image when the user writes for example Brookside which is an element of <series>. Can someone help me to complete the code to result as in the image ?

Cheers,

Php Code:

<?php 
$dom= new DOMDocument;
$dom->load (TVGuide.xml);
$targets=$argv[1];
$seriesList=$dom->getElementByTagName('series')
foreach $seriesList as $series
{
if ($series == $targets)
 echo series->parentnode "\n"
else
{
echo your results are not found;
}




}



XML source file:
<?xml version="1.0" encoding="ISO-8859-1"?>
<TVGuide start="2001-07-05" end="2001-07-05">
  <Channel>
    <Name>BBC1</Name>
    <Program>
      <Start>2001-07-05T19:00:00</Start>
      <Duration>PT30M</Duration>
      <Series>QuestionOfSport</Series>
      <Title></Title>
    </Program>
    <Program rating="5" flag="favorite">
      <Start>2001-07-05T19:30:00</Start>
      <Duration>PT30M</Duration>
      <Series>EastEnders</Series>
      <Title></Title>
      <Description>
        Mark's health scare forces him to reconsider his future with Lisa,
        while Jamie is torn between Sonia and Zoe.
      </Description>
      <CastList>
        <CastMember>
          <Character><Name>Zoe Slater</Name></Character>
          <Actor><Name>Michelle Ryan</Name></Actor>
        </CastMember>
        <CastMember>
          <Character><Name>Jamie Mitchell</Name></Character>
          <Actor><Name>Jack Ryder</Name></Actor>
        </CastMember>
        <CastMember>
          <Character><Name>Sonia Jackson</Name></Character>
          <Actor><Name>Natalie Cassidy</Name></Actor>
        </CastMember>
      </CastList>
      <Writers>
        <Writer><Name>Nick Saltrese</Name></Writer>
        <Writer><Name>Julie Wassmer</Name></Writer>
      </Writers>
      <Director><Name>Stewart Edwards</Name></Director>
      <Producer><Name>Emma Turner</Name></Producer>
    </Program>
    <Program type="documentary">
      <Start>2001-07-05T20:00:00</Start>
      <Duration>PT45M</Duration>
      <Series></Series>
      <Title>Get Real with Casualty</Title>
    </Program>
    <Program>
      <Start>2001-07-05T20:45:00</Start>
      <Duration>PT45M</Duration>
      <Series>Lottery</Series>
      <Title></Title>
    </Program>
    <Program>
      <Start>2001-07-05T21:00:00</Start>
      <Duration>PT1H</Duration>
      <Series>Panorama</Series>
      <Title></Title>
    </Program>
    <Program>
      <Start>2001-07-05T22:00:00</Start>
      <Duration>PT45M</Duration>
      <Series>Lottery</Series>
      <Title></Title>
    </Program>
  </Channel>
  <Channel>
    <Name>BBC2</Name>
    <Program>
      <Start>2001-07-05T19:00:00</Start>
      <Duration>PT1H</Duration>
      <Series>Snooker</Series>
      <Title></Title>
    </Program>
    <Program>
      <Start>2001-07-05T20:00:00</Start>
      <Duration>PT1H</Duration>
      <Series>HomeFront</Series>
      <Title></Title>
    </Program>
    <Program>
      <Start>2001-07-05T21:00:00</Start>
      <Duration>PT50M</Duration>
      <Series>WildAfrica</Series>
      <Title></Title>
    </Program>
    <Program flag="interesting">
      <Start>2001-07-05T21:50:00</Start>
      <Duration>PT40M</Duration>
      <Series>Taboo</Series>
      <Title>Nakedness</Title>
    </Program>
    <Program>
      <Start>2001-07-05T22:30:00</Start>
      <Duration>PT45M</Duration>
      <Series>Lottery</Series>
      <Title></Title>
    </Program>
  </Channel>
  <Channel>
    <Name>ITV</Name>
    <Program>
      <Start>2001-07-05T19:00:00</Start>
      <Duration>PT30M</Duration>
      <Series>Emmerdale</Series>
      <Title></Title>
    </Program>
    <Program>
      <Start>2001-07-05T19:30:00</Start>
      <Duration>PT30M</Duration>
      <Series>CoronationStreet</Series>
      <Title></Title>
    </Program>
    <Program>
      <Start>2001-07-05T20:00:00</Start>
      <Duration>PT1H</Duration>
      <Series>Millionaire</Series>
      <Title></Title>
    </Program>
    <Program type="drama">
      <Start>2001-07-05T21:00:00</Start>
      <Duration>PT2H</Duration>
      <Series></Series>
      <Title>Hot Money</Title>
    </Program>
  </Channel>
  <Channel>
    <Name>Channel 4</Name>
    <Program>
      <Start>2001-07-05T19:00:00</Start>
      <Duration>PT55M</Duration>
      <Series>Channel4News</Series>
      <Title></Title>
    </Program>
    <Program>
      <Start>2001-07-05T19:55:00</Start>
      <Duration>PT5M</Duration>
      <Series>SlotArt</Series>
      <Title></Title>
    </Program>
    <Program>
      <Start>2001-07-05T20:00:00</Start>
      <Duration>PT30M</Duration>
      <Series>Brookside</Series>
      <Title></Title>
    </Program>
    <Program>
      <Start>2001-07-05T20:30:00</Start>
      <Duration>PT30M</Duration>
      <Series>Brookside</Series>
      <Title></Title>
    </Program>
    <Program>
      <Start>2001-07-05T21:00:00</Start>
      <Duration>PT1H</Duration>
      <Series>Swallow</Series>
      <Title></Title>
    </Program>
    <Program flag="favorite">
      <Start>2001-07-05T22:00:00</Start>
      <Duration>PT1H</Duration>
      <Series>AllyMcBeal</Series>
      <Title></Title>
    </Program>
  </Channel>
  <Channel>
    <Name>Channel 5</Name>
    <Program>
      <Start>2001-07-05T19:00:00</Start>
      <Duration>PT30M</Duration>
      <Series>MovieChartShow</Series>
      <Title></Title>
    </Program>
    <Program>
      <Start>2001-07-05T19:30:00</Start>
      <Duration>PT30M</Duration>
      <Series>5News</Series>
      <Title></Title>
    </Program>
    <Program type="entertainment">
      <Start>2001-07-05T20:00:00</Start>
      <Duration>PT1H</Duration>
      <Series></Series>
      <Title>The World's Worst Drivers Caught On Tape</Title>
    </Program>
    <Program type="film">
      <Start>2001-07-05T21:00:00</Start>
      <Duration>PT1H55M</Duration>
      <Series></Series>
      <Title>Black and White</Title>
    </Program>
    <Program>
      <Start>2001-07-05T21:55:00</Start>
      <Duration>PT30M</Duration>
      <Series>Brookside</Series>
      <Title></Title>
    </Program>
  </Channel>
</TVGuide>

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