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git-svn-id: https://svn.php.net/repository/phpdoc/pl/trunk@82551 c90b9560-bf6c-de11-be94-00142212c4b1
119 lines
3.0 KiB
XML
119 lines
3.0 KiB
XML
<?xml version="1.0" encoding="iso-8859-2"?>
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<!-- EN-Revision: 1.4 Maintainer: leszek Status: ready -->
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<!-- $Revision: 1.4 $ -->
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<refentry id="function.array-keys">
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<refnamediv>
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<refname>array_keys</refname>
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<refpurpose>Zwraca wszystkie klucze z tablicy</refpurpose>
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</refnamediv>
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<refsect1>
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<title>Opis</title>
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<methodsynopsis>
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<type>array</type><methodname>array_keys</methodname>
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<methodparam><type>array</type><parameter>wej¶cie</parameter></methodparam>
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<methodparam choice="opt"><type>mixed</type><parameter>
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szukana_warto¶æ
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</parameter></methodparam>
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</methodsynopsis>
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<para>
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<function>array_keys</function> zwraca klucze, liczbowe i tekstowe, z
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tablicy <parameter>wej¶cie</parameter>.
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</para>
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<para>
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Je¶li podany zosta³ opcjonalny parameter <parameter>szukana_warto¶æ
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</parameter>, zwracane s± tylko klucze dla danej do których przypisana
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jest podana warto¶æ. W przeciwnym przypadku zwracane s± wszystkie klucze
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z tablicy <parameter>wej¶cie</parameter>.
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</para>
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<para>
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<example>
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<title>Przyk³ad u¿ycia <function>array_keys</function></title>
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<programlisting role="php">
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<![CDATA[
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$tablica = array (0 => 100, "kolor" => "czerwony");
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print_r(array_keys ($tablica));
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$tablica = array ("niebieski", "czerwony", "zielony", "niebieski", "niebieski");
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print_r(array_keys ($tablica, "niebieski"));
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$tablica = array ("kolor" => array("niebieski", "czerwony", "zielony"), "rozmiar" => array("ma³y", "¶redni", "du¿y"));
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print_r(array_keys ($tablica));
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]]>
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</programlisting>
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<para>
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Powy¿szy przyk³ad wy¶wietli:
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<screen>
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<![CDATA[
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Array
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(
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[0] => 0
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[1] => kolor
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)
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Array
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(
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[0] => 0
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[1] => 3
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[2] => 4
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)
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Array
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(
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[0] => kolor
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[1] => rozmiar
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)
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]]>
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</screen>
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</para>
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</example>
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</para>
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<note>
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<para>
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Ta funkcja zosta³a dodana w PHP 4. Poni¿ej znajduje siê implementacja
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tej funkcji dla tych, którzy jeszcz u¿ywaj± PHP 3.
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<example>
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<title>
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Implementacja <function>array_keys</function> dla u¿ytkowników
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</title>
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<programlisting role="php">
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<![CDATA[
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function array_keys ($arr, $term="") {
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$t = array();
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while (list($k,$v) = each($arr)) {
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if ($term && $v != $term) {
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continue;
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}
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$t[] = $k;
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}
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return $t;
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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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</note>
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<para>
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Patrz tak¿e: <function>array_values</function>.
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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:"../../../../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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