How to parse XML using PHP?

Method of parsing XML: SimpleXML: Use object syntax to parse simple XML documents. DOMDocument: Provides fine-grained control over XML documents.

How to parse XML in PHP

Parsing XML is a common task in web development, and PHP provides several parsing methods XML method. This article will introduce the two most popular methods: SimpleXML and DOMDocument.

Using SimpleXML

SimpleXML is PHP's built-in library for parsing simple XML documents. It uses object syntax to access XML nodes and attributes, making it very easy to use.

$xml = simplexml_load_file('example.xml');

foreach ($xml->person as $person) {
  echo "姓名：" . $person->name . "<br>";
  echo "年龄：" . $person->age . "<br>";
}

Using DOMDocument

DOMDocument is the W3C standard DOM (Document Object Model) implementation. It provides finer control over XML documents.

$doc = new DOMDocument();
$doc->load('example.xml');

$xpath = new DOMXPath($doc);
$nodes = $xpath->query('/people/person');

foreach ($nodes as $node) {
  $name = $node->getElementsByTagName('name')->item(0)->nodeValue;
  $age = $node->getElementsByTagName('age')->item(0)->nodeValue;

  echo "姓名：" . $name . "<br>";
  echo "年龄：" . $age . "<br>";
}

Practical case: Extracting weather data from XML

The following is a practical example of using SimpleXML to extract weather data:

$xml = simplexml_load_file('weather.xml');

$location = $xml->location;
$temperature = $xml->current->temperature;
$humidity = $xml->current->humidity;

echo "位置：" . $location . "<br>";
echo "气温：" . $temperature . "<br>";
echo "湿度：" . $humidity . "<br>";

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