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Sync unset #832

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Jan 4, 2024
Merged

Sync unset #832

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22 changes: 13 additions & 9 deletions reference/var/functions/unset.xml
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Original file line number Diff line number Diff line change
@@ -1,7 +1,7 @@
<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<!-- EN-Revision: 52bd05eb26b2851eb4ae34b12607582d56a33897 Maintainer: HonestQiao Status: ready -->
<!-- CREDITS: mowangjuanzi -->
<!-- EN-Revision: 9f30ccc6aa0dabe411c52305202fe85209ddc06b Maintainer: HonestQiao Status: ready -->
<!-- CREDITS: mowangjuanzi, Luffy -->
<refentry xml:id="function.unset" xmlns="http://docbook.org/ns/docbook">
<refnamediv>
<refname>unset</refname>
Expand Down Expand Up @@ -187,10 +187,10 @@ Before unset: 3, after unset: 23
<![CDATA[
<?php
// 销毁单个变量
unset ($foo);
unset($foo);

// 销毁单个数组元素
unset ($bar['quux']);
unset($bar['quux']);

// 销毁一个以上的变量
unset($foo1, $foo2, $foo3);
Expand All @@ -202,9 +202,9 @@ unset($foo1, $foo2, $foo3);
<title>使用 <literal>(unset)</literal> 类型强制转换</title>
<para>
<link linkend="language.types.null.casting"><literal>(unset)</literal></link>
类型强制转换常常和函数 <function>unset</function> 引起困惑。为了完整性，<literal>(unset)</literal>
是作为 <literal>NULL</literal> 类型的强制转换。它不会改变变量的类型。自
PHP 7.2.0 起，弃用 (unset) 强制转换，自 8.0.0 起移除。
类型强制转换经常与函数 <function>unset</function> 引起困惑。
为了完整性，<literal>(unset)</literal> 是作为 <literal>NULL</literal> 类型的强制转换。
它不会改变变量的类型。自 PHP 7.2.0 起，弃用 (unset) 强制转换，自 8.0.0 起移除。
</para>
<programlisting role="php">
<![CDATA[
Expand Down Expand Up @@ -232,7 +232,11 @@ string(6) "Felipe"
&note.language-construct;
<note>
<para>
It is possible to unset even object properties visible in current context.
它可以取消设置当前上下文中可见的对象属性。
</para>
<para>
如果已声明，则在访问未设置的属性时调用 <link linkend="object.get">__get()</link>，
在设置未设置的属性时调用 <link linkend="object.set">__set()</link>。
</para>
</note>
<note>
Expand All @@ -243,7 +247,7 @@ string(6) "Felipe"
<note>
<para>
在 <function>unset</function> 一个无法访问的对象属性时，如果定义了
<link linkend="object.unset">__unset()</link> 则对调用这个重载方法。
<link linkend="object.unset">__unset()</link> 则会调用这个重载方法。
</para>
</note>
</refsect1>
Expand Down