mirror of
https://github.com/php/doc-de.git
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140 lines
3.4 KiB
XML
140 lines
3.4 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
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<!-- $Revision$ -->
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<!-- EN-Revision: 0a192fcd9cc43c0007de795063b4494974058992 Maintainer: cmb Status: ready -->
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<!-- Reviewed: yes -->
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<!-- Rev-Revision: 94af09dfef5a1918d509f75c80051803d5e1e1e5 Reviewer: samesch -->
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<!-- CREDITS: tom -->
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<refentry xml:id="function.key" xmlns="http://docbook.org/ns/docbook">
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<refnamediv>
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<refname>key</refname>
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<refpurpose>Liefert einen Schlüssel eines Arrays</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>null</type></type><methodname>key</methodname>
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<methodparam><type class="union"><type>array</type><type>object</type></type><parameter>array</parameter></methodparam>
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</methodsynopsis>
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<para>
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<function>key</function> gibt das Index-Element der aktuellen Position im
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Array zurück.
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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>array</parameter></term>
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<listitem>
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<para>
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Das Array.
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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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Die Funktion <function>key</function> gibt lediglich den Schlüssel des
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Arrayelements zurück, auf das der interne Zeiger gerade zeigt. Der Zeiger
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wird dabei nicht bewegt. Zeigt der interne Zeiger über das Ende der
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Elementliste hinaus oder ist das Array leer, gibt <function>key</function>
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&null; zurück.
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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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<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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&standard.changelog.calling-on-objects;
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</tbody>
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</tgroup>
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</informaltable>
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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><function>key</function>-Beispiel</title>
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<programlisting role="php">
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<![CDATA[
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<?php
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$array = array(
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'Frucht1' => 'Apfel',
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'Frucht2' => 'Orange',
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'Frucht3' => 'Traube',
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'Frucht4' => 'Apfel',
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'Frucht5' => 'Apfel');
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// Diese Schleife gibt alle Schlüssel des assoziativen
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// Arrays aus, deren Wert "Apfel" ist.
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while ($fruit_name = current($array)) {
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if ($fruit_name == 'Apfel') {
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echo key($array), "\n";
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}
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next($array);
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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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Frucht1
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Frucht4
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Frucht5
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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>current</function></member>
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<member><function>next</function></member>
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<member><function>array_key_first</function></member>
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<member><link linkend="control-structures.foreach">foreach</link></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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