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134 lines
3.1 KiB
XML
134 lines
3.1 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
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<!-- EN-Revision: 770c6facae667218f69c8ea2715ea20f6fab32f3 Maintainer: PhilDaiguille Status: ready -->
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<!-- Reviewed: no -->
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<refentry xml:id="simplexmlelement.xpath" xmlns="http://docbook.org/ns/docbook">
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<refnamediv>
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<refname>SimpleXMLElement::xpath</refname>
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<refpurpose>Ejecuta una consulta XPath sobre datos XML</refpurpose>
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</refnamediv>
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<refsect1 role="description">
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&reftitle.description;
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<methodsynopsis role="SimpleXMLElement">
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<modifier>public</modifier> <type class="union"><type>array</type><type>null</type><type>false</type></type><methodname>SimpleXMLElement::xpath</methodname>
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<methodparam><type>string</type><parameter>expression</parameter></methodparam>
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</methodsynopsis>
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<para>
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El método <literal>xpath</literal> busca en el nodo SimpleXML
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hijos que correspondan al <parameter>expression</parameter>
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<acronym>Xpath</acronym>.
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</para>
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</refsect1>
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<refsect1 role="parameters">
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&reftitle.parameters;
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<para>
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<variablelist>
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<varlistentry>
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<term><parameter>expression</parameter></term>
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<listitem>
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<para>
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Una ruta XPath
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</para>
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</refsect1>
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<refsect1 role="returnvalues">
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&reftitle.returnvalues;
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<para>
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Devuelve un array de objetos SimpleXMLElement en caso de éxito o &null;
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o &false; si ocurre un error.
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</para>
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</refsect1>
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<refsect1 role="examples">
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&reftitle.examples;
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<para>
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<example>
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<title>Xpath</title>
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<programlisting role="php">
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<![CDATA[
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<?php
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$string = <<<XML
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<a>
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<b>
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<c>text</c>
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<c>stuff</c>
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</b>
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<d>
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<c>code</c>
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</d>
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</a>
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XML;
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$xml = new SimpleXMLElement($string);
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/* Se busca <a><b><c> */
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$result = $xml->xpath('/a/b/c');
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foreach ($result as $node) {
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echo '/a/b/c: ',$node,"\n";
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}
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/* Las rutas relativas también funcionan... */
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$result = $xml->xpath('b/c');
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foreach ($result as $node) {
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echo 'b/c: ',$node,"\n";
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}
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?>
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]]>
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</programlisting>
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&example.outputs;
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<screen>
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<![CDATA[
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/a/b/c: text
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/a/b/c: stuff
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b/c: text
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b/c: stuff
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]]>
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</screen>
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<simpara>
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Observe que los dos resultados son iguales.
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</simpara>
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</example>
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</para>
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</refsect1>
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<refsect1 role="seealso">
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&reftitle.seealso;
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<para>
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<simplelist>
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<member><methodname>SimpleXMLElement::registerXPathNamespace</methodname></member>
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<member><methodname>SimpleXMLElement::getDocNamespaces</methodname></member>
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<member><methodname>SimpleXMLElement::getNamespaces</methodname></member>
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<member><xref linkend="simplexml.examples-basic"/></member>
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</simplelist>
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</para>
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</refsect1>
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</refentry>
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<!-- Keep this comment at the end of the file
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Local variables:
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mode: sgml
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sgml-omittag:t
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sgml-shorttag:t
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sgml-minimize-attributes:nil
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sgml-always-quote-attributes:t
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sgml-indent-step:1
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sgml-indent-data:t
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indent-tabs-mode:nil
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sgml-parent-document:nil
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sgml-default-dtd-file:"~/.phpdoc/manual.ced"
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sgml-exposed-tags:nil
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sgml-local-catalogs:nil
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sgml-local-ecat-files:nil
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End:
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vim600: syn=xml fen fdm=syntax fdl=2 si
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vim: et tw=78 syn=sgml
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vi: ts=1 sw=1
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-->
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