SimpleXMLElement::getNamespaces

(PHP 5 >= 5.1.2, PHP 7)

Returns namespaces used in document

public array SimpleXMLElement::getNamespaces ([ bool $recursive = false ] )

Returns namespaces used in document

Parameters:

recursive

If specified, returns all namespaces used in parent and child nodes. Otherwise, returns only namespaces used in root node.

Returns:

The getNamespaces method returns an array of namespace names with their associated URIs.

Examples:

Get document namespaces in use

<?php

$xml = <<<XML
<?xml version="1.0" standalone="yes"?>
<people xmlns:p="http://example.org/ns" xmlns:t="http://example.org/test">
    <p:person id="1">John Doe</p:person>
    <p:person id="2">Susie Q. Public</p:person>
</people>
XML;
 
$sxe = new SimpleXMLElement($xml);

$namespaces = $sxe->getNamespaces(true);
var_dump($namespaces);

?>

The above example will output:

array(1) {
  ["p"]=>
  string(21) "http://example.org/ns"
}