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void.xml
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37 lines (34 loc) · 1.07 KB
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<?xml version="1.0" encoding="utf-8"?>
<!-- EN-Revision: 161dde4fe721309398dd324edbf02aec409f127b Maintainer: mowangjuanzi Status: ready -->
<sect1 xml:id="language.types.void">
<title>Void</title>
<para>
<type>void</type> 是仅用于返回类型,表示函数不返回值,但该函数仍可能会终止。因此,它不能成为<link
linkend="language.types.type-system.composite.union">联合类型</link>声明的一部分。自 PHP 7.1.0 起可用。
</para>
<note>
<simpara>
即使函数的返回类型是 <type>void</type>,但仍然可以返回值,但值只能始终为 &null;。
</simpara>
</note>
</sect1>
<!-- Keep this comment at the end of the file
Local variables:
mode: sgml
sgml-omittag:t
sgml-shorttag:t
sgml-minimize-attributes:nil
sgml-always-quote-attributes:t
sgml-indent-step:1
sgml-indent-data:t
indent-tabs-mode:nil
sgml-parent-document:nil
sgml-default-dtd-file:"~/.phpdoc/manual.ced"
sgml-exposed-tags:nil
sgml-local-catalogs:nil
sgml-local-ecat-files:nil
End:
vim600: syn=xml fen fdm=syntax fdl=2 si
vim: et tw=78 syn=sgml
vi: ts=1 sw=1
-->