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2219dd3714
- All id attributes are now xml:id - Add docbook namespace to all root elements - Replace <ulink /> with <link xlink:href /> - Minor markup fixes here and there - Bump EN-Revision where appropriate git-svn-id: https://svn.php.net/repository/phpdoc/zh/trunk@238342 c90b9560-bf6c-de11-be94-00142212c4b1
96 lines
2.6 KiB
XML
Executable File
96 lines
2.6 KiB
XML
Executable File
<?xml version="1.0" encoding="gb2312"?>
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<!-- $Revision: 1.7 $ -->
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<!-- $Author: bjori $ -->
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<!-- EN-Revision: 1.11 Maintainer: dallas Status: ready -->
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<refentry xml:id="function.array-diff" xmlns="http://docbook.org/ns/docbook">
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<refnamediv>
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<refname>array_diff</refname>
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<refpurpose>计算数组的差集</refpurpose>
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</refnamediv>
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<refsect1>
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<title>说明</title>
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<methodsynopsis>
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<type>array</type><methodname>array_diff</methodname>
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<methodparam><type>array</type><parameter>array1</parameter></methodparam>
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<methodparam><type>array</type><parameter>array2</parameter></methodparam>
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<methodparam choice="opt"><type>array</type><parameter> ...</parameter></methodparam>
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</methodsynopsis>
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<para>
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<function>array_diff</function> 返回一个数组，该数组包括了所有在
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<parameter>array1</parameter> 中但是不在任何其它参数数组中的值。注意键名保留不变。
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</para>
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<para>
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<example>
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<title><function>array_diff</function> 例子</title>
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<programlisting role="php">
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<![CDATA[
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<?php
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$array1 = array("a" => "green", "red", "blue", "red");
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$array2 = array("b" => "green", "yellow", "red");
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$result = array_diff($array1, $array2);
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print_r($result);
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?>
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]]>
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</programlisting>
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<para>
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在 $array1 中多次出现的值一样处理，输出结果为：
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</para>
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<screen>
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<![CDATA[
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Array
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(
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[1] => blue
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)
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]]>
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</screen>
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</example>
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</para>
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<note>
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<simpara>
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两个单元仅在 <literal>(string) $elem1 === (string) $elem2</literal>
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时被认为是相同的。也就是说，当字符串的表达是一样的时候。
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<!-- TODO: example of it... -->
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</simpara>
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</note>
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<note>
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<simpara>
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注意本函数只检查了多维数组中的一维。当然可以用
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<literal>array_diff($array1[0], $array2[0]);</literal>
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检查更深的维度。
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</simpara>
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</note>
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<warning>
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<simpara>
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本函数在 PHP 4.0.4 中是坏的！
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<!-- TODO: when exactly was this broken?... -->
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</simpara>
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</warning>
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<para>
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参见 <function>array_diff_assoc</function>，<function>array_intersect</function> 和
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<function>array_intersect_assoc</function>。
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</para>
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</refsect1>
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</refentry>
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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:"../../../../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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