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

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<refentry xml:id="simplexmlelement.addattribute" xmlns="http://docbook.org/ns/docbook">
 <refnamediv>
  <refname>SimpleXMLElement::addAttribute</refname>
  <refpurpose>
   Adds an attribute to the SimpleXML element
  </refpurpose>
 </refnamediv>
 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <modifier>public</modifier> <type>void</type><methodname>SimpleXMLElement::addAttribute</methodname>
   <methodparam><type>string</type><parameter>name</parameter></methodparam>
   <methodparam choice="opt"><type>string</type><parameter>value</parameter></methodparam>
   <methodparam choice="opt"><type>string</type><parameter>namespace</parameter></methodparam>
  </methodsynopsis>
  <para>
   Adds an attribute to the SimpleXML element.
  </para>
 </refsect1>

 <refsect1 role="parameters">
  &reftitle.parameters;
  <para>
   <variablelist>
    <varlistentry>
     <term><parameter>name</parameter></term>
     <listitem>
      <para>
       The name of the attribute to add.
      </para>
     </listitem>
    </varlistentry>
    <varlistentry>
     <term><parameter>value</parameter></term>
     <listitem>
      <para>
       The value of the attribute.
      </para>
     </listitem>
    </varlistentry>
    <varlistentry>
     <term><parameter>namespace</parameter></term>
     <listitem>
      <para>
       If specified, the namespace to which the attribute belongs.
      </para>
     </listitem>
    </varlistentry>
   </variablelist>
  </para>
 </refsect1>

 <refsect1 role="returnvalues">
  &reftitle.returnvalues;
  <para>
   &return.void;
  </para>
 </refsect1>

 <refsect1 role="examples">
  &reftitle.examples;
  <para>
   <note>
    <para>
     Listed examples may include <literal>example.php</literal>,
     which refers to the XML string found in the first example
     of the <link linkend="simplexml.examples-basic">basic usage</link> guide.
    </para>
   </note>
   <example>
    <title>Add attributes and children to a SimpleXML element</title>
    <programlisting role="php">
<![CDATA[
<?php

include 'example.php';
 
$sxe = new SimpleXMLElement($xmlstr);
$sxe->addAttribute('type', 'documentary');

$movie = $sxe->addChild('movie');
$movie->addChild('title', 'PHP2: More Parser Stories');
$movie->addChild('plot', 'This is all about the people who make it work.');

$characters = $movie->addChild('characters');
$character  = $characters->addChild('character');
$character->addChild('name', 'Mr. Parser');
$character->addChild('actor', 'John Doe');

$rating = $movie->addChild('rating', '5');
$rating->addAttribute('type', 'stars');
 
echo $sxe->asXML();

?>
]]>
    </programlisting>
    &example.outputs.similar;
    <screen>
<![CDATA[
<?xml version="1.0" standalone="yes"?>
<movies type="documentary">
 <movie>
  <title>PHP: Behind the Parser</title>
  <characters>
   <character>
    <name>Ms. Coder</name>
    <actor>Onlivia Actora</actor>
   </character>
   <character>
    <name>Mr. Coder</name>
    <actor>El Act&#xD3;r</actor>
   </character>
  </characters>
  <plot>
   So, this language. It's like, a programming language. Or is it a
   scripting language? All is revealed in this thrilling horror spoof
   of a documentary.
  </plot>
  <great-lines>
   <line>PHP solves all my web problems</line>
  </great-lines>
  <rating type="thumbs">7</rating>
  <rating type="stars">5</rating>
 </movie>
 <movie>
  <title>PHP2: More Parser Stories</title>
  <plot>This is all about the people who make it work.</plot>
  <characters>
   <character>
    <name>Mr. Parser</name>
    <actor>John Doe</actor>
   </character>
  </characters>
  <rating type="stars">5</rating>
 </movie>
</movies>
]]>
    </screen>
   </example>
  </para>
 </refsect1>

 <refsect1 role="seealso">
  &reftitle.seealso;
  <para>
   <simplelist>
    <member><methodname>SimpleXMLElement::addChild</methodname></member>
    <member><xref linkend="simplexml.examples-basic"/></member>
   </simplelist>
  </para>
 </refsect1>
</refentry>

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