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149 lines
3.9 KiB
XML
149 lines
3.9 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
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<!-- $Revision$ -->
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<!-- EN-Revision: 77325b622f91355b118e8f3bc9ff940e8201f55d Maintainer: Luffy Status: ready -->
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<reference xml:id="class.php-incomplete-class" role="class" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xi="http://www.w3.org/2001/XInclude">
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<title>__PHP_Incomplete_Class 类</title>
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<titleabbrev>__PHP_Incomplete_Class</titleabbrev>
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<partintro>
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<section xml:id="php-incomplete-class.intro">
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&reftitle.intro;
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<para>
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由 <function>unserialize</function> 创建的在尝试反序列化未定义类或未在 <function>unserialize</function>
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的 <parameter>options</parameter> 数组的 <literal>allowed_classes</literal>
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中列出的类。
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</para>
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<para>
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在 PHP 7.2.0 之前，对 <classname>__PHP_Incomplete_Class</classname> 类使用 <function>is_object</function>
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会返回 &false;。从 PHP 7.2.0 开始，将返回 &true;。
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</para>
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</section>
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<section xml:id="php-incomplete-class.synopsis">
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&reftitle.classsynopsis;
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<classsynopsis class="class">
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<ooclass>
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<modifier role="attribute">#[\AllowDynamicProperties]</modifier>
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<modifier>final</modifier>
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<classname>__PHP_Incomplete_Class</classname>
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</ooclass>
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</classsynopsis>
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<para>
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此类没有默认属性或方法。
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由 <function>unserialize</function> 创建时，
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除了所有反序列化的属性和值之外，
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对象还将具有一个 <literal>__PHP_Incomplete_Class_Name</literal> 属性，
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该属性将包含反序列化类的名称。
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</para>
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</section>
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<section xml:id="php-incomplete-class.changelog" role="changelog">
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&reftitle.changelog;
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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>8.0.0</entry>
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<entry>
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此类现在是 <literal>final</literal>。
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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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</section>
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<section xml:id="php-incomplete-class.examples" role="examples">
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&reftitle.examples;
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<example xml:id="php-incomplete-class.basic-example">
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<title>由 <function>unserialize</function> 创建</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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{
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public string $property = "myValue";
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}
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$myObject = new MyClass;
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$foo = serialize($myObject);
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// unserializes all objects into __PHP_Incomplete_Class objects
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$disallowed = unserialize($foo, ["allowed_classes" => false]);
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var_dump($disallowed);
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// unserializes all objects into __PHP_Incomplete_Class objects except those of MyClass2 and MyClass3
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$disallowed2 = unserialize($foo, ["allowed_classes" => ["MyClass2", "MyClass3"]]);
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var_dump($disallowed2);
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// unserializes undefined class into __PHP_Incomplete_Class object
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$undefinedClass = unserialize('O:16:"MyUndefinedClass":0:{}');
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var_dump($undefinedClass);
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]]>
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</programlisting>
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&example.outputs;
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<screen>
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<![CDATA[
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object(__PHP_Incomplete_Class)#2 (2) {
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["__PHP_Incomplete_Class_Name"]=>
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string(7) "MyClass"
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["property"]=>
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string(7) "myValue"
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}
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object(__PHP_Incomplete_Class)#3 (2) {
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["__PHP_Incomplete_Class_Name"]=>
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string(7) "MyClass"
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["property"]=>
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string(7) "myValue"
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}
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object(__PHP_Incomplete_Class)#4 (1) {
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["__PHP_Incomplete_Class_Name"]=>
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string(16) "MyUndefinedClass"
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}
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]]>
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</screen>
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</example>
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</section>
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</partintro>
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</reference>
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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:"~/.phpdoc/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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