mirror of
https://github.com/sigmasternchen/php-doc-en
synced 2025-03-19 10:28:54 +00:00
83c7ec65fd
See also ctype_digit git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@196443 c90b9560-bf6c-de11-be94-00142212c4b1
82 lines
2.3 KiB
XML
82 lines
2.3 KiB
XML
<?xml version="1.0" encoding="iso-8859-1"?>
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<!-- $Revision: 1.5 $ -->
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<refentry id="function.is-numeric">
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<refnamediv>
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<refname>is_numeric</refname>
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<refpurpose>
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Finds whether a variable is a number or a numeric string
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</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>bool</type><methodname>is_numeric</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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Finds whether the given variable is numeric. Numeric strings consist of
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optional sign, any number of digits, optional decimal part and optional
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exponential part. Thus <literal>+0123.45e6</literal> is a valid numeric
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value. Hexadecimal notation (<literal>0xFF</literal>) is allowed too but
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only without sign, decimal and exponential part.
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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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The variable being evaluated.
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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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Returns &true; if <parameter>var</parameter> is a number or a numeric
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string, &false; otherwise.
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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>ctype_digit</function></member>
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<member><function>is_bool</function></member>
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<member><function>is_null</function></member>
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<member><function>is_float</function></member>
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<member><function>is_int</function></member>
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<member><function>is_string</function></member>
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<member><function>is_object</function></member>
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<member><function>is_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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<!-- 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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