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136 lines
4.0 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
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<!-- EN-Revision: 2e60c5134e7a847c99f81eb3f7ecee1f5efeeace Maintainer: PhilDaiguille Status: ready -->
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<!-- Reviewed: no -->
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<!-- CREDITS: DavidA. -->
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<refentry xml:id="function.array-search" xmlns="http://docbook.org/ns/docbook">
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<refnamediv>
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<refname>array_search</refname>
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<refpurpose>Busca en un array la primera clave asociada al valor</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 class="union"><type>int</type><type>string</type><type>false</type></type><methodname>array_search</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 <parameter>needle</parameter>
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en <parameter>haystack</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
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comparación se realiza respetando la casilla.
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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 argumento <parameter>strict</parameter> es
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&true;, entonces <function>array_search</function> buscará
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elementos <emphasis>idénticos</emphasis> en
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<parameter>haystack</parameter>. Esto significa que esta función
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realizará una <link linkend="language.types">comparación estricta del tipo</link>
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de <parameter>needle</parameter> en <parameter>haystack</parameter>,
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y que los objetos provienen de la misma instancia.
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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 la clave para <parameter>needle</parameter> si es encontrada
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en el array, &false; en caso contrario.
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</para>
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<para>
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Si <parameter>needle</parameter> es encontrado más de una vez en
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<parameter>haystack</parameter>, la primera clave coincidente es
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devuelta. Para encontrar todas las claves correspondientes, utilice en su lugar
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la función <function>array_keys</function> con el argumento opcional
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<parameter>filter_value</parameter>.
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</para>
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&return.falseproblem;
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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 con <function>array_search</function></title>
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<programlisting role="php">
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<![CDATA[
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<?php
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$array = array(0 => 'blue', 1 => 'red', 2 => 'green', 3 => 'red');
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$key = array_search('green', $array); // $key = 2;
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print_r($key);
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$key = array_search('red', $array); // $key = 1;
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print_r($key);
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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>array_keys</function></member>
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<member><function>array_values</function></member>
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<member><function>array_key_exists</function></member>
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<member><function>in_array</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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Local variables:
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mode: sgml
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sgml-omittag:t
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sgml-minimize-attributes:nil
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sgml-indent-step:1
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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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