使用PHP读取XML属性

Question

I m using a API to display results w.r.t to search query.

The output will be in the form of XML, I need to parse the XML and display the result in the browser.

The file contains many attributes from which i m not sure how to extract the results.

Here is my code:

<?xml version="1.0" ?>
<S:Envelope xmlns:S="http://schemas.xmlsoap.org/soap/envelope/">
<S:Body>
<ns3:tourDetailsFullResponse xmlns:ns2="http://example.com/" xmlns:ns3="http://example.com/" xmlns:ns4="http://www.example.com/">

<ns4:MarketLocalisedTourData SellingCompanyCode="CODE1" OperatingProductCode="CODE2" MarketVariationCode="CODE3" Duration="8" Currency="USD" CatalogueCode="CODE4" TropicsBrochureCode="CODE5" BrandCode="CODE6" BookableOnline="true">

<ns4:TourInfo>
<ns4:TourName>London to Rome Highlights 2013</ns4:TourName>
<ns4:Metadata>
    <ns4:TourCategories>
        <ns4:TourCategory Name="TourStyles">
            <ns4:CategoryValue Name="European Discoveries"/>
        </ns4:TourCategory>
    </ns4:TourCategories>
    <ns4:Brochures>
        <ns4:Brochure Name="CostSaver 2013" Code="CODE1"/>
    </ns4:Brochures>
</ns4:Metadata>
<ns4:ContinentsVisited>
    <ns4:Continent Name="Europe" Code="EURO"/>
</ns4:ContinentsVisited>
<ns4:CountriesVisited>
    <ns4:Country Name="France" Continent="EURO" Code="FR"/>
    <ns4:Country Name="United Kingdom" Continent="EURO" Code="GB"/>
    <ns4:Country Name="Italy" Continent="EURO" Code="IT"/>
    <ns4:Country Name="Switzerland" Continent="EURO" Code="CH"/>
</ns4:CountriesVisited>
<ns4:LocationsVisited>
    <ns4:Location Name="Paris" Country="FR"/>
    <ns4:Location Name="Dover" Country="GB"/>
    <ns4:Location Name="London" Country="GB"/>
    <ns4:Location Name="Rome" Country="IT"/>
    <ns4:Location Name="Calais" Country="FR"/>
    <ns4:Location Name="Venice" Country="IT"/>
    <ns4:Location Name="Lucerne" Country="CH"/>
    <ns4:Location Name="Florence" Country="IT"/>
</ns4:LocationsVisited>
<ns4:Description>A lively journey through elegant Paris, gorgeous Lake Lucerne, charming Venice and cultural Florence, bookended by stays in London and legendary Rome. Spend a day at leisure in London and get the best views of Rome from high up in St. Peter’s Basilica before throwing a lucky coin in Trevi Fountain.</ns4:Description>
<ns4:Assets>
    <ns4:Image Width="297" Url="http://www.example.com/imageurl" Type="map" Name="route_map" Height="297" Caption="route_map"/>
    <ns4:Image Width="600" Url="http://www.example.com/imageurl" Type="map" Name="route_map" Height="600" Caption="route_map"/>
    <ns4:Image Width="531" Url="http://www.example.com/imageurl" Type="photo" Name="primary_image" Height="531" Caption="primary_image"/>
    <ns4:Image Width="125" Url="http://www.example.com/imageurl" Type="photo" Name="primary_image" Height="125" Caption="primary_image"/>
</ns4:Assets>
  ....continues

Now i want to extract the continents visited , countries visited, locations visited, itinerary, assests etc...

I tried using simple xml like the following

$feed = "response1_full.xml";

$xml = simplexml_load_file($feed);

print_r($xml);

foreach($xml->LocationsVisited[0]->attributes() as $a => $b) {
    echo $a,'="',$b,"\"
";
}
also tried 
foreach($xml->TourInfo->LocationsVisited[0]->attributes() as $a => $b) {
    echo $a,'="',$b,"\"
";
}

also tried all other possibilities which results in same error

Fatal error: Call to a member function attributes() on a non-object in C:\xampp\htdocs\test\xmlread2.php on line 10

I m searching a solution for this more than couple of days.

Answer 1

If you want to traverse into children in their own namespace you have to tell SimpleXMLElement which namespace:

$ns4 = $xml->children('S', true)->Body
        ->children('ns3', true)->tourDetailsFullResponse
            ->children('ns4', true);

$locations = $ns4->MarketLocalisedTourData->TourInfo->LocationsVisited->Location;

foreach ($locations as $location) {
    $attributes = $location->attributes();
    echo $attributes['Name'];
    echo $attributes['Country'];
}

However you can make your life more easy by using xpath with the namespace(s) you're interested in by registering them.