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git-svn-id: https://svn.php.net/repository/phpdoc/es/trunk@349887 c90b9560-bf6c-de11-be94-00142212c4b1
189 lines
4.7 KiB
XML
189 lines
4.7 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
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<!-- $Revision$ -->
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<!-- EN-Revision: 68a9c82e06906a5c00e0199307d87dd3739f719b Maintainer: seros Status: ready -->
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<!-- Reviewed: yes Maintainer: seros -->
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<refentry xml:id="function.in-array" xmlns="http://docbook.org/ns/docbook">
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<refnamediv>
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<refname>in_array</refname>
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<refpurpose>Comprueba si un valor existe en un array</refpurpose>
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</refnamediv>
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<refsect1 role="description">
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&reftitle.description;
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<methodsynopsis>
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<type>bool</type><methodname>in_array</methodname>
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<methodparam><type>mixed</type><parameter>needle</parameter></methodparam>
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<methodparam><type>array</type><parameter>haystack</parameter></methodparam>
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<methodparam choice="opt"><type>bool</type><parameter>strict</parameter><initializer>&false;</initializer></methodparam>
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</methodsynopsis>
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<para>
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Busca la aguja (<parameter>needle</parameter>) en el pajar (<parameter>haystack</parameter>) usando una
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comparación flexible a menos que esté establecido <parameter>strict</parameter>.
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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>needle</parameter></term>
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<listitem>
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<para>
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El valor a buscar.
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</para>
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<note>
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<para>
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Si <parameter>needle</parameter> es un string, la comparación se realiza
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considerando las mayúsculas/minúsculas.
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</para>
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</note>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><parameter>haystack</parameter></term>
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<listitem>
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<para>
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El array.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><parameter>strict</parameter></term>
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<listitem>
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<para>
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Si el tercer parámetro <parameter>strict</parameter> está establecido a &true;,
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la función <function>in_array</function> también comprobará los
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<link linkend="language.types">tipos</link> de
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<parameter>needle</parameter> en <parameter>haystack</parameter>.
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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 &true; si <parameter>needle</parameter> se encuentra en el array,
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&false; de lo contrario.
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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>Ejemplo de <function>in_array</function></title>
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<programlisting role="php">
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<![CDATA[
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<?php
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$os = array("Mac", "NT", "Irix", "Linux");
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if (in_array("Irix", $os)) {
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echo "Existe Irix";
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}
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if (in_array("mac", $os)) {
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echo "Existe mac";
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}
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?>
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]]>
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</programlisting>
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<para>
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La segunda condición falla porque <function>in_array</function>
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considera las mayúsculas-minúsculas, así que el programa anterior mostrará:
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</para>
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<screen>
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<![CDATA[
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Existe Irix
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]]>
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</screen>
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</example>
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</para>
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<para>
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<example>
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<title>Ejemplo de <function>in_array</function> en modo estricto</title>
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<programlisting role="php">
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<![CDATA[
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<?php
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$a = array('1.10', 12.4, 1.13);
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if (in_array('12.4', $a, true)) {
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echo "Se encontró '12.4' con comprobación estricta\n";
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}
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if (in_array(1.13, $a, true)) {
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echo "Se encontró 1.13 con comprobación estricta\n";
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}
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?>
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]]>
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</programlisting>
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&example.outputs;
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<screen>
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<![CDATA[
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Se encontró 1.13 con comprobación estricta
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]]>
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</screen>
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</example>
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</para>
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<para>
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<example>
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<title><function>in_array</function> con un array como aguja</title>
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<programlisting role="php">
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<![CDATA[
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<?php
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$a = array(array('p', 'h'), array('p', 'r'), 'o');
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if (in_array(array('p', 'h'), $a)) {
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echo "Se encontró 'ph'\n";
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}
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if (in_array(array('f', 'i'), $a)) {
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echo "Se encontró 'fi'\n";
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}
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if (in_array('o', $a)) {
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echo "Se encontró 'o'\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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Se encontró 'ph'
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Se encontró 'o'
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]]>
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</screen>
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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><function>array_search</function></member>
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<member><function>isset</function></member>
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<member><function>array_key_exists</function></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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