reference/classobj/functions/get-class.xml
4f36c26a72c40b16e955c3c1c88041910932d0bf
4f36c26a72c40b16e955c3c1c88041910932d0bf
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<term><parameter>object</parameter></term>
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<listitem>
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<para>
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The tested object. This parameter may be omitted when inside a class.
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The tested object.
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</para>
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<note>
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<simpara>
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Explicitly passing &null; as the <parameter>object</parameter> is no
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longer allowed as of PHP 7.2.0.
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</simpara>
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<simpara>
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The parameter is still optional and calling <function>get_class</function>
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without a parameter from inside a class will work, but passing &null; now
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emits an <constant>E_WARNING</constant> notice.
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longer allowed as of PHP 7.2.0 and emits an <constant>E_WARNING</constant>.
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As of PHP 8.0.0, a <classname>TypeError</classname> is emitted when
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&null; is used.
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</simpara>
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</note>
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</listitem>
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&reftitle.returnvalues;
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<para>
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Returns the name of the class of which <parameter>object</parameter> is an
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instance. Returns &false; if <parameter>object</parameter> is not an
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object.
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</para>
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<para>
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If <parameter>object</parameter> is omitted when inside a class, the
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name of that class is returned.
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instance.
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</para>
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<para>
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If the <parameter>object</parameter> is an instance of a class which exists
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&reftitle.errors;
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<para>
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If <function>get_class</function> is called with anything other than an
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object, an <constant>E_WARNING</constant> level error is raised.
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object, <classname>TypeError</classname> is raised. Prior to PHP 8.0.0,
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an <constant>E_WARNING</constant> level error was raised.
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</para>
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<para>
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If <function>get_class</function> is called with no arguments from outside a class,
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an <classname>Error</classname> is thrown. Prior to PHP 8.0.0,
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an <constant>E_WARNING</constant> level error was raised.
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</para>
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</refsect1>
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<refsect1 role="changelog">
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</thead>
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<tbody>
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<row>
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<entry>7.2.0</entry>
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<entry>8.3.0</entry>
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<entry>
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&null; was removed as the default value for <parameter>object</parameter>,
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and is no longer a valid input.
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Calling <function>get_class</function> without an argument now emits an
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<constant>E_DEPRECATED</constant> warning;
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previously, calling this function inside a class returned the name of that class.
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</entry>
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</row>
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<row>
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<entry>5.3.0</entry>
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<entry>8.0.0</entry>
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<entry>
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&null; became the default value for <parameter>object</parameter>,
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so passing &null; to <parameter>object</parameter> now has the same
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result as not passing any value.
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Calling this function from outside a class, without any arguments,
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will now throw an <classname>Error</classname>.
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Previously, an <constant>E_WARNING</constant> was raised
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and the function returned &false;.
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</entry>
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</row>
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<row>
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<entry>7.2.0</entry>
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<entry>
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Prior to this version the default value for <parameter>object</parameter>
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was &null; and it had the same effect as not passing any value. Now
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&null; has been removed as the default value for <parameter>object</parameter>,
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and is no longer a valid input.
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</entry>
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</row>
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</tbody>
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<member><function>get_called_class</function></member>
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<member><function>get_parent_class</function></member>
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<member><function>gettype</function></member>
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<member><function>get_debug_type</function></member>
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<member><function>is_subclass_of</function></member>
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</simplelist>
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</para>
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