mirror of
https://github.com/sigmasternchen/php-doc-en
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9eb72ca307
git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@199960 c90b9560-bf6c-de11-be94-00142212c4b1
116 lines
2.7 KiB
XML
Executable file
116 lines
2.7 KiB
XML
Executable file
<?xml version="1.0" encoding="iso-8859-1"?>
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<!-- $Revision: 1.3 $ -->
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<refentry id="function.property-exists">
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<refnamediv>
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<refname>property_exists</refname>
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<refpurpose>
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Checks if the object or class has a property
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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>property_exists</methodname>
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<methodparam><type>mixed</type><parameter>class</parameter></methodparam>
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<methodparam><type>string</type><parameter>property</parameter></methodparam>
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</methodsynopsis>
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<para>
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This function checks if the given <parameter>property</parameter> exists in
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the specified class (and if it was declared as public).
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</para>
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<note>
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<para>
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As opposed with <function>isset</function>,
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<function>property_exists</function> returns &true; even if the property
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has the value &null;.
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</para>
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</note>
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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>class</parameter></term>
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<listitem>
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<para>
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A string with the class name or an object of the class to test for
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><parameter>property</parameter></term>
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<listitem>
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<para>
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The name of the property
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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 the property exists, &false; if it doesn't exist or
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&null; in case of an error.
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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>A <function>property_exists</function> example</title>
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<programlisting role="php">
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<![CDATA[
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<?php
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class myClass {
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public $mine;
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private $xpto;
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}
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var_dump(property_exists('myClass', 'mine')); //true
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var_dump(property_exists(new myClass, 'mine')); //true
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var_dump(property_exists('myClass', 'xpto')); //false, isn't public
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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>method_exists</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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