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git-svn-id: https://svn.php.net/repository/phpdoc/es/trunk@299049 c90b9560-bf6c-de11-be94-00142212c4b1
126 lines
3.4 KiB
XML
126 lines
3.4 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
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<!-- $Revision$ -->
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<!-- EN-Revision: fb70264f425fef5e493ba42bfcdde8b811d651d8 Maintainer: yago Status: ready -->
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<refentry xml:id="function.array-rand" xmlns="http://docbook.org/ns/docbook">
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<refnamediv>
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<refname>array_rand</refname>
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<refpurpose>Selecciona una o más entradas aleatorias de 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>mixed</type><methodname>array_rand</methodname>
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<methodparam><type>array</type><parameter>input</parameter></methodparam>
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<methodparam choice="opt"><type>int</type><parameter>num_req</parameter><initializer>1</initializer></methodparam>
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</methodsynopsis>
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<para>
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<function>array_rand</function> es bastante útil cuando se desea elegir una
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o más entradas aleatorias de un array.
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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>input</parameter></term>
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<listitem>
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<para>
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El array de entrada.
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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>num_req</parameter></term>
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<listitem>
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<para>
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Especifica cuántas entradas se desea elegir. Si se trata de elegir
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más elementos de los que hay en el array el resultado producirá
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un error de nivel <constant>E_WARNING</constant>.
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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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Si se está eligiendo únicamente una entrada, <function>array_rand</function>
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devuelve la clave de una entrada al azar. De lo contrario, devuelve un array
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de claves para las entradas aleatorias. Esto se ha hecho de esta forma para que se pueda elegir
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claves al igual que valores al azar del array.
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</para>
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</refsect1>
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<refsect1 role="changelog">
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&reftitle.changelog;
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<para>
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<informaltable>
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<tgroup cols="2">
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<thead>
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<row>
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<entry>&Version;</entry>
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<entry>&Description;</entry>
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</row>
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</thead>
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<tbody>
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<row>
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<entry>5.2.10</entry>
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<entry>
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Ya no se muestra mezclado el array de claves.
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</entry>
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</row>
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&changelog.randomseed;
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</tbody>
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</tgroup>
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</informaltable>
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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>array_rand</function></title>
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<programlisting role="php">
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<![CDATA[
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<?php
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$input = array("Neo", "Morpheus", "Trinity", "Cypher", "Tank");
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$rand_keys = array_rand($input, 2);
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echo $input[$rand_keys[0]] . "\n";
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echo $input[$rand_keys[1]] . "\n";
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?>
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]]>
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</programlisting>
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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>shuffle</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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--> |