mirror of
https://github.com/php/doc-zh.git
synced 2026-03-28 00:52:06 +01:00
39186f910d
git-svn-id: https://svn.php.net/repository/phpdoc/zh/trunk@194401 c90b9560-bf6c-de11-be94-00142212c4b1
105 lines
2.5 KiB
XML
Executable File
105 lines
2.5 KiB
XML
Executable File
<?xml version="1.0" encoding="gb2312"?>
|
|
<!-- $Revision: 1.5 $ -->
|
|
<!-- $Author: dallas $ -->
|
|
<!-- EN-Revision: 1.14 Maintainer: dallas Status: ready -->
|
|
<refentry id="function.array-unique">
|
|
<refnamediv>
|
|
<refname>array_unique</refname>
|
|
<refpurpose>移除数组中重复的值</refpurpose>
|
|
</refnamediv>
|
|
<refsect1>
|
|
<title>说明</title>
|
|
<methodsynopsis>
|
|
<type>array</type><methodname>array_unique</methodname>
|
|
<methodparam><type>array</type><parameter>array</parameter></methodparam>
|
|
</methodsynopsis>
|
|
<para>
|
|
<function>array_unique</function> 接受
|
|
<parameter>array</parameter> 作为输入并返回没有重复值的新数组。
|
|
</para>
|
|
<para>
|
|
注意键名保留不变。<function>array_unique</function>
|
|
先将值作为字符串排序，然后对每个值只保留第一个遇到的键名，接着忽略所有后面的键名。这并不意味着在未排序的
|
|
<parameter>array</parameter> 中同一个值的第一个出现的键名会被保留。
|
|
</para>
|
|
<note>
|
|
<simpara>
|
|
当且仅当
|
|
<literal>(string) $elem1 === (string) $elem2</literal> 时两个单元被认为相同。就是说，当字符串的表达一样时。
|
|
</simpara>
|
|
<simpara>
|
|
第一个单元将被保留。
|
|
</simpara>
|
|
</note>
|
|
<para>
|
|
<example>
|
|
<title><function>array_unique</function> 例子</title>
|
|
<programlisting role="php">
|
|
<![CDATA[
|
|
<?php
|
|
$input = array("a" => "green", "red", "b" => "green", "blue", "red");
|
|
$result = array_unique($input);
|
|
print_r($result);
|
|
?>
|
|
]]>
|
|
</programlisting>
|
|
&example.outputs;
|
|
<screen role="php">
|
|
<![CDATA[
|
|
Array
|
|
(
|
|
[a] => green
|
|
[0] => red
|
|
[1] => blue
|
|
)
|
|
]]>
|
|
</screen>
|
|
</example>
|
|
</para>
|
|
<para>
|
|
<example>
|
|
<title><function>array_unique</function> 和类型</title>
|
|
<programlisting role="php">
|
|
<![CDATA[
|
|
<?php
|
|
$input = array(4, "4", "3", 4, 3, "3");
|
|
$result = array_unique($input);
|
|
var_dump($result);
|
|
?>
|
|
]]>
|
|
</programlisting>
|
|
&example.outputs;
|
|
<screen role="php">
|
|
<![CDATA[
|
|
array(2) {
|
|
[0] => int(4)
|
|
[2] => string(1) "3"
|
|
}
|
|
]]>
|
|
</screen>
|
|
</example>
|
|
</para>
|
|
</refsect1>
|
|
</refentry>
|
|
|
|
<!-- 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:"../../../../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
|
|
-->
|