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require-once.xml
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require-once.xml
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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<!-- $Author$ -->
<!-- EN-Revision: ffbe6525350c91d58e1d5b7a52c46c911035c8e0 Maintainer: dallas Status: ready -->
<sect1 xml:id="function.require-once" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
<title>require_once</title>
<?phpdoc print-version-for="require_once"?>
<para>
<literal>require_once</literal> 表达式和 <function>require</function>
表达式完全相同,唯一区别是 PHP 会检查该文件是否已经被包含过,如果是则不会再次包含。
</para>
<para>
参见 <function>include_once</function> 的文档来理解
<literal>_once</literal> 的含义,并理解与没有 <literal>_once</literal> 时候有什么不同。
</para>
</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
-->