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git-svn-id: https://svn.php.net/repository/phpdoc/es/trunk@332910 c90b9560-bf6c-de11-be94-00142212c4b1
114 lines
3.1 KiB
XML
114 lines
3.1 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
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<!-- $Revision$ -->
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<!-- EN-Revision: 03083e6a6633a433d4269d7c24b7be0bd546ebc6 Maintainer: argosback Status: ready -->
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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>Obtener el valor flotante de una variable</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>var</parameter></methodparam>
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</methodsynopsis>
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<para>
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Obtiene el valor valor <type>float</type> de <parameter>var</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>var</parameter></term>
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<listitem>
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<para>
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Puede ser cualquier tipo escalar. No se puede utilizar <function>floatval</function>
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en objetos, si es usado emitirá un error de nivel <constant>E_NOTICE</constant> y
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devolverá 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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El valor flotante de la variable dada. Arrays vacios devolverán 0, arrays no vacios
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devolverán 1.
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</para>
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<para>
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Las cadenas generalmente devolverán 0, aunque esto depende de los
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primeros caracteres de la cadena. Las reglas comunes de
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<link linkend="language.types.float.casting">conversión a flotante</link>
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se aplican en cualquier caso.
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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>floatval</function></title>
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<programlisting role="php">
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<![CDATA[
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<?php
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$var = '122.34343El';
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$valor_float_de_var = floatval($var);
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echo $valor_float_de_var; // 122.34343
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?>
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]]>
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</programlisting>
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</example>
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</para>
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<para>
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<example>
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<title>Ejemplo de <function>floatval</function> con caracteres a la izquierda no numéricos</title>
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<programlisting role="php">
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<![CDATA[
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<?php
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$var = 'El122.34343';
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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">Conversión de Tipos</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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