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https://github.com/sigmasternchen/php-doc-en
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2e2a6ee884
git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@117201 c90b9560-bf6c-de11-be94-00142212c4b1
59 lines
1.7 KiB
XML
59 lines
1.7 KiB
XML
<?xml version="1.0" encoding="iso-8859-1"?>
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<!-- $Revision: 1.4 $ -->
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<!-- splitted from ./en/functions/var.xml, last change in rev 1.35 -->
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<refentry id="function.is-null">
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<refnamediv>
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<refname>is_null</refname>
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<refpurpose>
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Finds whether a variable is &null;
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</refpurpose>
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</refnamediv>
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<refsect1>
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<title>Description</title>
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<methodsynopsis>
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<type>bool</type><methodname>is_null</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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Returns &true; if <parameter>var</parameter> is <type>null</type>,
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&false; otherwise.
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</para>
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<para>
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See the <link linkend="language.types.null.syntax">&null;</link> type
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when a variable is considered to be &null; and when not.
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</para>
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<para>
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See also <link linkend="language.types.null.syntax">&null;</link>,
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<function>is_bool</function>,
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<function>is_numeric</function>,
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<function>is_float</function>,
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<function>is_int</function>,
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<function>is_string</function>,
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<function>is_object</function>,
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<function>is_array</function>,
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<function>is_integer</function>, and
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<function>is_real</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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