PHP，XML - 獲取子節點及其屬性

Question

如何從此XML文件獲取所有「座位」子節點及其屬性？

<seatmap id="1"> 
     <seat row="A" seatnum="01" available="1" /> 
     <seat row="A" seatnum="02" available="1" /> 
     <seat row="A" seatnum="03" available="1" /> 
     <seat row="A" seatnum="04" available="1" /> 
     <seat row="A" seatnum="05" available="1" /> 
    </seatmap> 

我有不同的seatmaps，所以我想用一個ID 然後分配所有的「座位」節點及其變量屬性查詢得到它們。

到目前爲止，我一直在使用DOM方法，但也許simpleXML或XPath會更容易，因爲從DOMDocumet，DOMElement，DOMNode向下鑽取時，其真正的 會混淆。

任何幫助將是偉大的，歡呼聲！

Answer 1

$XML = <<<XML 
<parent> 
    <seatmap id="1"> 
     <seat row="A" seatnum="01" available="1" /> 
     <seat row="A" seatnum="02" available="1" /> 
     <seat row="A" seatnum="03" available="1" /> 
     <seat row="A" seatnum="04" available="1" /> 
     <seat row="A" seatnum="05" available="1" /> 
    </seatmap> 
</parent> 
XML; 

$xml_nodes = new SimpleXMLElement($XML); 

$nodes = $xml_nodes->xpath('//seatmap[@id = "1"]/seat'); // Replace the ID value with whatever seatmap id you're trying to access 

foreach($nodes as $seat) 
{ 
    // You can then access: $seat['row'], $seat['seatnum'], $seat['available'] 
} 

Answer 2

可以輕鬆地與DOM來完成：

$dom = new DOMDocument; 
$dom->load('xmlfile.xml'); 
$xpath = new DOMXPath($dom); 

$seats = $xpath->query('//seatmap[@id="1"]/seat'); 
if ($seats->length) { 
    foreach ($seats as $seat) { 
     echo "row: ".$seat->getAttribute('row').PHP_EOL; 
     echo "seatnum: ".$seat->getAttribute('seatnum').PHP_EOL; 
     echo "available: ".$seat->getAttribute('available').PHP_EOL; 
    } 
} else { 
    die('seatmap not found or is empty'); 
}