Question

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PHP xpath – find element with a value and also get elements before and after element

I have the following xml:

<Table>
    <ID>100</ID>
    <Name>Fridge</Name>
    <Description>A cool refrigerator</Description>
</Table>
<Table>
    <ID>100</ID>
    <Name>Fridge</Name>
    <Description>Latest Refrigerator</Description>
</Table>
<Table>
    <ID>200</ID>
    <Name>Fridge</Name>
    <Description>Another refrigerator</Description>
</Table>

In the example above, I would like to get the child values of Name and Description for the nodes with ID=100. There are around 1000 Table nodes in the xml file.

How can i parse the entire xml and get the Name and Description values for only the nodes with ID equal to 100 ?

So far, i have tried the following code, which could not give what i wanted:

$source = 'Tables.xml';
$xmlstr = file_get_contents($source);
$sitemap = new SimpleXMLElement($xmlstr);

$sitemap = new SimpleXMLElement($source,null,true);

foreach($sitemap as $url) {

    if($url->ID == '100')
    {
        echo 'Name: '.(string)$url->Name.', Description: '.(string)$url->Description.'<br>';
    }
}

Answer 1

This should be pretty straightforward if you get all Table tags and loop over them:

// Assuming you already loaded the XML into the SimpleXML object $xml
$names_and_descriptions = array();
foreach ($xml->Table as $t) {
  if ($t->ID == 100) {
    echo $t->Name . " " . $t->Description . "\n";
    // Or stick them into an array or whatever...
    $names_and_descriptions[] = array(
      'name'=>$t->Name, 
      'description'=>$t->Description
    );
  }
}
var_dump($names_and_descriptions);