How to load all xml:lang attributes with SimpleXML - php

Question

How to read ALL atribute xml:lang values?
Sometimes I do not know how many languages are defined in XMLs data.
<?xml version="1.0" encoding="UTF-8"?>
<offer>
<products>
<product>
<description>
<name xml:lang="eng">English translation</name>
<name xml:lang="lat">Latvian translation</name>
</description>
</product>
<product>
<description>
<name xml:lang="eng">The same English</name>
<name xml:lang="pol">And Polish language</name>
</description>
</product>
</products>
</offer>
I can xml:lang parse in PHP by adding exact language code in xpath
print_r($xml->xpath('products/product/description/name[#xml:lang = "eng"]'));
But I need to add all xml:lang atributes values to parsed array.
Can it be done with PHP SimpleXML?

Answer 1

what about this:
$nodes = $xml->xpath('products/product/description/name[#xml:lang]');
Will return an array of <name>-nodes.
If this is not it, please clarify exactly your desired result.
EDIT
try this to get the xml:lang attributes only:
$langs = $xml->xpath("products/product/description/name[#xml:lang]/#xml:lang");
// $lang is an array of simplexml-elements, transform the values to string like this:
$langs = array_map("strval", $langs);

Answer 2

I'm not 100% on SimpleXML sorry, but I know DomDocument can do what you are after. Hopefully this can be of use to you:
$xmlstring = '<?xml version="1.0" encoding="UTF-8"?>
<offer>
<products>
<product>
<description>
<name xml:lang="eng">English translation</name>
<name xml:lang="lat">Latvian translation</name>
</description>
</product>
<product>
<description>
<name xml:lang="eng">The same English</name>
<name xml:lang="pol">And Polish language</name>
</description>
</product>
</products>
</offer>';
$dom = new DOMDocument();
$dom->loadXML($xmlstring); //or $dom->load('filename.xml');
$xpath = new DOMXPath($dom);
$nodes = $xpath->query('//products/product/description/name');
foreach ($nodes as $node) {
echo 'Language: ' . $node->getAttribute('xml:lang') . '<br />';
echo 'Value: ' . $node->nodeValue . '<br /><br />';
}
You can assign $node->getAttribute('xml:lang') to a variable and run some checks to see if it matches 'eng' or whatever you need.
I used xpath as you had in your original post, but you can also use $dom->getElementsByTagName('name') and access values and attributes in much the same way.

Answer 3

I found easier way to access namespaced attributes. You could use $name->attributes("xml", true) function.
Here is working example:
<?php
$xmlString = '
<products>
<product>
<name xml:lang="eng">
Apples
</name>
<name xml:lang="fr">
Pommes
</name>
</product>
<product>
<name xml:lang="eng">
Strawberries
</name>
<name xml:lang="fr">
Fraises
</name>
</product>
</products>
';
$xml = new \SimpleXMLElement($xmlString);
foreach($xml->product as $product)
{
foreach ($product->name as $name)
{
$attributes = $name->attributes("xml", true);
// print_r($attributes);
foreach ($attributes as $attributeName => $attributeValue)
{
// echo $attributeName . PHP_EOL;
// echo $attributeValue . PHP_EOL;
if ($attributeValue == "eng" && $attributeName == "lang") {
echo "English: " . trim(((string) $name)) . PHP_EOL;
}
if ($attributeValue == "fr" && $attributeName == "lang") {
echo "French: " . trim(((string) $name)) . PHP_EOL;
}
}
}
}
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