reference/spl/functions/class-implements.xml
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60af8c2b746d51c1556cc2ddc4d4163222347b96
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<refsect1 role="description">
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&reftitle.description;
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<methodsynopsis>
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<type>array</type><methodname>class_implements</methodname>
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<methodparam><type>mixed</type><parameter>class</parameter></methodparam>
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<type class="union"><type>array</type><type>false</type></type><methodname>class_implements</methodname>
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<methodparam><type class="union"><type>object</type><type>string</type></type><parameter>object_or_class</parameter></methodparam>
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<methodparam choice="opt"><type>bool</type><parameter>autoload</parameter><initializer>&true;</initializer></methodparam>
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</methodsynopsis>
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<para>
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This function returns an array with the names of the interfaces that the
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given <parameter>class</parameter> and its parents implement.
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given <parameter>object_or_class</parameter> and its parents implement.
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</para>
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</refsect1>
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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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<term><parameter>object_or_class</parameter></term>
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<listitem>
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<para>
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An object (class instance) or a string (class or interface name).
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<term><parameter>autoload</parameter></term>
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<listitem>
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<para>
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Whether to allow this function to load the class automatically through
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the <function>__autoload</function> magic method.
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Whether to <link linkend="language.oop5.autoload">autoload</link>
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if not already loaded.
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</para>
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</listitem>
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</varlistentry>
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<refsect1 role="returnvalues">
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&reftitle.returnvalues;
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<para>
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An array on success, or &false; on error.
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</para>
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</refsect1>
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<refsect1 role="changelog">
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&reftitle.changelog;
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<para>
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<informaltable>
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<tgroup cols="2">
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<thead>
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<row>
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<entry>&Version;</entry>
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<entry>&Description;</entry>
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</row>
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</thead>
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<tbody>
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<row>
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<entry>5.1.0</entry>
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<entry>
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Added the option to pass the <parameter>class</parameter> parameter as
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a string. Added the <parameter>autoload</parameter> parameter.
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</entry>
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</row>
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</tbody>
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</tgroup>
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</informaltable>
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An array on success, or &false; when the given class doesn't exist.
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</para>
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</refsect1>
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@@ -92,15 +67,12 @@ class bar implements foo {}
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print_r(class_implements(new bar));
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// since PHP 5.1.0 you may also specify the parameter as a string
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// you may also specify the parameter as a string
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print_r(class_implements('bar'));
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spl_autoload_register();
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function __autoload($class_name) {
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require_once $class_name . '.php';
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}
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// use __autoload to load the 'not_loaded' class
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// use autoloading to load the 'not_loaded' class
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print_r(class_implements('not_loaded', true));
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?>
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(
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[foo] => foo
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)
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Array
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(
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[foo] => foo
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)
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Array
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(
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[interface_of_not_loaded] => interface_of_not_loaded
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@@ -124,17 +99,28 @@ Array
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</para>
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</refsect1>
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<refsect1 role="notes">
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&reftitle.notes;
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<note>
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<simpara>
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To check that an object implements an interface, &instanceof;
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or the <function>is_a</function> function should be used instead.
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</simpara>
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</note>
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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>class_parents</function></member>
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<member><function>get_declared_interfaces</function></member>
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<member><function>is_a</function></member>
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<member>&instanceof;</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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