php-doc-en/reference/simplexml/simplexmlelement/getDocNamespaces.xml

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<refentry xml:id="simplexmlelement.getdocnamespaces" xmlns="http://docbook.org/ns/docbook">
 <refnamediv>
  <refname>SimpleXMLElement::getDocNamespaces</refname>
  <refpurpose>
   Returns namespaces declared in document
  </refpurpose>
 </refnamediv>
 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <modifier>public</modifier> <type>array</type><methodname>SimpleXMLElement::getDocNamespaces</methodname>
   <methodparam choice="opt"><type>bool</type><parameter>recursive</parameter><initializer>false</initializer></methodparam>
   <methodparam choice="opt"><type>bool</type><parameter>from_root</parameter><initializer>true</initializer></methodparam>
  </methodsynopsis>
  <para>
   Returns namespaces declared in document
  </para>
 </refsect1>

 <refsect1 role="parameters">
  &reftitle.parameters;
  <para>
   <variablelist>
    <varlistentry>
     <term><parameter>recursive</parameter></term>
     <listitem>
      <para>
       If specified, returns all namespaces declared in parent and child nodes. 
       Otherwise, returns only namespaces declared in root node.
      </para>
     </listitem>
    </varlistentry>
    <varlistentry>
     <term><parameter>from_root</parameter></term>
     <listitem>
      <para>
       Allows you to recursively check namespaces under a child node instead of
       from the root of the XML doc.
      </para>
     </listitem>
    </varlistentry>
   </variablelist>
  </para>
 </refsect1>

 <refsect1 role="returnvalues">
  &reftitle.returnvalues;
  <para>
   The <literal>getDocNamespaces</literal> method returns an <type>array</type> 
   of namespace names with their associated URIs.
  </para>
 </refsect1>

 <refsect1 role="examples">
  &reftitle.examples;
  <para>
   <example>
    <title>Get document namespaces</title>
    <programlisting role="php">
<![CDATA[
<?php

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

$namespaces = $sxe->getDocNamespaces();
var_dump($namespaces);

?>
]]>
    </programlisting>
    &example.outputs;
    <screen>
<![CDATA[
array(1) {
   ["p"]=>
   string(21) "http://example.org/ns"
}
]]>
    </screen>
   </example>
  </para>
  <para>
   <example>
    <title>Working with multiple namespaces</title>
    <programlisting role="php">
<![CDATA[
<?php

$xml = <<<XML
<?xml version="1.0" standalone="yes"?>
<people xmlns:p="http://example.org/ns" xmlns:t="http://example.org/test">
    <p:person t:id="1">John Doe</p:person>
    <p:person t:id="2" a:addr="123 Street" xmlns:a="http://example.org/addr">
        Susie Q. Public
    </p:person>
</people>
XML;
 
$sxe = new SimpleXMLElement($xml);

$namespaces = $sxe->getDocNamespaces(TRUE);
var_dump($namespaces);

?>
]]>
    </programlisting>
    &example.outputs;
    <screen>
<![CDATA[
array(3) {
  ["p"]=>
  string(21) "http://example.org/ns"
  ["t"]=>
  string(23) "http://example.org/test"
  ["a"]=>
  string(23) "http://example.org/addr"
}
]]>
    </screen>
   </example>
  </para>
 </refsect1>

 <refsect1 role="changelog">
  &reftitle.changelog;
  <para>
   <informaltable>
    <tgroup cols="2">
     <thead>
      <row>
       <entry>&Version;</entry>
       <entry>&Description;</entry>
      </row>
     </thead>
     <tbody>
      <row>
       <entry>5.4.0</entry>
       <entry>
        Added <parameter>from_root</parameter> parameter.
       </entry>
      </row>
     </tbody>
    </tgroup>
   </informaltable>
  </para>
 </refsect1>
 
 <refsect1 role="seealso">
  &reftitle.seealso;
  <para>
   <simplelist>
    <member><methodname>SimpleXMLElement::getNamespaces</methodname></member>
    <member><methodname>SimpleXMLElement::registerXPathNamespace</methodname></member>
   </simplelist>
  </para>
 </refsect1>
</refentry>

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