get-parent-class.xml

<?xml version="1.0" encoding="utf-8"?>
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<refentry xml:id="function.get-parent-class" xmlns="http://docbook.org/ns/docbook">
 <refnamediv>
  <refname>get_parent_class</refname>
  <refpurpose>检索对象或者类的父级类名</refpurpose>
 </refnamediv>
 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <type class="union"><type>string</type><type>false</type></type><methodname>get_parent_class</methodname>
   <methodparam choice="opt"><type class="union"><type>object</type><type>string</type></type><parameter>object_or_class</parameter></methodparam>
  </methodsynopsis>
  <para>
   检索对象或者类的父级类名。
  </para>
 </refsect1>
 <refsect1 role="parameters">
  &reftitle.parameters;
  <para>
   <variablelist>
    <varlistentry>
     <term><parameter>object_or_class</parameter></term>
     <listitem>
      <para>
       检查的对象或者类名。
      </para>
     </listitem>
    </varlistentry>
   </variablelist>
  </para>
 </refsect1>
 <refsect1 role="returnvalues">
  &reftitle.returnvalues;
  <para>
   返回 <parameter>object_or_class</parameter> 是类名或者类实例的父类名称。
  </para>
  <para>
   如果对象没有父类或者指定的类名不存在，则返回 &false;。
  </para>
 </refsect1>

 <refsect1 role="changelog">
  &reftitle.changelog;
  <informaltable>
   <tgroup cols="2">
    <thead>
     <row>
      <entry>&Version;</entry>
      <entry>&Description;</entry>
     </row>
    </thead>
    <tbody>
     <row>
      <entry>8.3.0</entry>
      <entry>
       不带参数调用 <function>get_parent_class</function> 现在会发出 <constant>E_DEPRECATED</constant>
       warning；之前，在类内部调用此函数会返回该类的名称。
      </entry>
     </row>
     <row>
      <entry>8.0.0</entry>
      <entry>
       <parameter>object_or_class</parameter> 参数现在仅接受对象或者有效的类名。
      </entry>
     </row>
    </tbody>
   </tgroup>
  </informaltable>
 </refsect1>

 <refsect1 role="examples">
  &reftitle.examples;
  <para>
   <example>
    <title>使用 <function>get_parent_class</function></title>
    <programlisting role="php">
<![CDATA[
<?php

class Dad {
    function __construct()
    {
    // 实现一些逻辑
    }
}

class Child extends Dad {
    function __construct()
    {
        echo "I'm " , get_parent_class($this) , "'s son\n";
    }
}

class Child2 extends Dad {
    function __construct()
    {
        echo "I'm " , get_parent_class('child2') , "'s son too\n";
    }
}

$foo = new child();
$bar = new child2();

?>
]]>
    </programlisting>
    &example.outputs;
    <screen>
<![CDATA[
I'm Dad's son
I'm Dad's son too
]]>
    </screen>
   </example>
  </para>
 </refsect1>
 <refsect1 role="seealso">
  &reftitle.seealso;
  <para>
   <simplelist>
    <member><function>get_class</function></member>
    <member><function>is_subclass_of</function></member>
    <member><function>class_parents</function></member>
   </simplelist>
  </para>
 </refsect1>
</refentry>

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