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ed360c0616
* Sync reference/xml, var, url, tidy, strings, session, uodbc with EN * Delete unnecessary char from session-module-name.xml file * Small change in session, tidy, url, var functions files
137 lines
3.6 KiB
XML
137 lines
3.6 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
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<!-- EN-Revision: fca3920773bcf7ea2aa2f7306103f6d3d0e6b901 Maintainer: sobak Status: ready -->
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<!-- $Revision$ -->
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<!-- CREDITS: sobak, grzesiek -->
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<refentry xml:id="function.floatval" xmlns="http://docbook.org/ns/docbook">
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<refnamediv>
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<refname>floatval</refname>
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<refpurpose>Pobiera wartość zmiennoprzecinkową zmiennej</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>float</type><methodname>floatval</methodname>
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<methodparam><type>mixed</type><parameter>value</parameter></methodparam>
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</methodsynopsis>
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<para>
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Pobiera wartość zmiennej <parameter>value</parameter> jako typ <type>float</type>.
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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>value</parameter></term>
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<listitem>
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<para>
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Może być dowolnym typem skalarnym. <function>floatval</function> nie powinno
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być używane na obiektach - w takim wypadku zostanie wyemitowany błąd poziomu
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<constant>E_WARNING</constant>, a funkcja zwróci 1.
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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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Wartość zmiennoprzecinkowa podanej zmiennej. Puste tablice zwracają 0,
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a niepuste tablice 1.
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</para>
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<para>
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Łańcuchy znaków prawdopodobnie zwrócą 0, jednak zależy to od
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pierwszych od lewej znaków łańcucha. Zastosowanie mają ogólne
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zasady
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<link linkend="language.types.float.casting">rzutowania na float</link>.
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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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<row>
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<entry>8.0.0</entry>
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<entry>
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Poziom błędu podczas konwersji z obiektu został zmieniony z <constant>E_NOTICE</constant> na <constant>E_WARNING</constant>.
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</entry>
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</row>
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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>Przykład użycia <function>floatval</function></title>
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<programlisting role="php">
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<![CDATA[
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<?php
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$var = '122.34343The';
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$float_value_of_var = floatval($var);
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echo $float_value_of_var; // 122.34343
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?>
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]]>
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</programlisting>
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</example>
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</para>
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<para>
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<example>
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<title><function>floatval</function> i znaki nienumeryczne na początku łańcucha</title>
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<programlisting role="php">
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<![CDATA[
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<?php
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$var = 'The122.34343';
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$float_value_of_var = floatval($var);
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echo $float_value_of_var; // 0
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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>boolval</function></member>
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<member><function>intval</function></member>
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<member><function>strval</function></member>
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<member><function>settype</function></member>
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<member><link linkend="language.types.type-juggling">Przemienność typów</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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