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48dfd2c071
git-svn-id: https://svn.php.net/repository/phpdoc/zh/trunk@194858 c90b9560-bf6c-de11-be94-00142212c4b1
100 lines
3.0 KiB
XML
Executable File
100 lines
3.0 KiB
XML
Executable File
<?xml version="1.0" encoding="gb2312"?>
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<!-- $Revision: 1.2 $ -->
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<!-- $Author: dallas $ -->
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<!-- EN-Revision: 1.3 Maintainer: dallas Status: ready -->
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<refentry id="function.array-diff-ukey">
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<refnamediv>
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<refname>array_diff_ukey</refname>
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<refpurpose>用回调函数对键名比较计算数组的差集</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_ukey</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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<methodparam><type>callback</type><parameter>key_compare_func</parameter></methodparam>
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</methodsynopsis>
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<para>
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<function>array_diff_ukey</function> 返回一个数组，该数组包括了所有出现在
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<parameter>array1</parameter>
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中但是未出现在任何其它参数数组中的键名的值。注意关联关系保留不变。本函数和
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<function>array_diff</function> 相同只除了比较是根据键名而不是值来进行的。
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</para>
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<para>
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此比较是通过用户提供的回调函数来进行的。如果认为第一个参数小于，等于，或大于第二个参数时必须分别返回一个小于零，等于零，或大于零的整数。
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</para>
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<para>
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<example>
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<title><function>array_diff_ukey</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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function key_compare_func($key1, $key2)
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{
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if ($key1 == $key2)
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return 0;
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else if ($key1 > $key2)
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return 1;
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else
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return -1;
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}
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$array1 = array('blue' => 1, 'red' => 2, 'green' => 3, 'purple' => 4);
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$array2 = array('green' => 5, 'blue' => 6, 'yellow' => 7, 'cyan' => 8);
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var_dump(array_diff_ukey($array1, $array2, 'key_compare_func'));
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?>
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]]>
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</programlisting>
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&example.outputs;
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<screen>
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<![CDATA[
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array(2) {
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["red"]=>
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int(2)
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["purple"]=>
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int(4)
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}
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]]>
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</screen>
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</example>
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</para>
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<note>
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<simpara>
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注意本函数只检查了多维数组中的一维。当然，可以用
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<literal>array_diff_ukey($array1[0], $array2[0], 'callback_func');</literal>
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来检查更深的维度。
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</simpara>
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</note>
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<para>
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参见
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<function>array_diff</function>，<function>array_udiff</function>，<function>array_diff_assoc</function>，<function>array_diff_uassoc</function>，<function>array_udiff_assoc</function>，<function>array_udiff_uassoc</function>，<function>array_diff_key</function>，<function>array_intersect</function>，<function>array_intersect_assoc</function>，<function>array_intersect_uassoc</function>，<function>array_intersect_key</function>
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和
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<function>array_intersect_ukey</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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