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94 lines
2.2 KiB
XML
94 lines
2.2 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
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<!-- EN-Revision: b68b5e427e7454a59437dd6f7ff27b4f9228fe6d Maintainer: mowangjuanzi Status: ready -->
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<refentry xml:id="function.array-first" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
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<refnamediv>
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<refname>array_first</refname>
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<refpurpose>获取数组的第一个值</refpurpose>
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</refnamediv>
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<refsect1 role="description">
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&reftitle.description;
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<methodsynopsis>
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<type>mixed</type><methodname>array_first</methodname>
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<methodparam><type>array</type><parameter>array</parameter></methodparam>
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</methodsynopsis>
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<simpara>
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获取指定 <parameter>array</parameter> 的第一个值。
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</simpara>
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</refsect1>
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<refsect1 role="parameters">
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&reftitle.parameters;
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<variablelist>
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<varlistentry>
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<term><parameter>array</parameter></term>
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<listitem>
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<simpara>
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数组。
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</simpara>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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<refsect1 role="returnvalues">
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&reftitle.returnvalues;
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<simpara>
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如果数组非空，则返回 <parameter>array</parameter> 的第一个值；否则返回 &null;。
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</simpara>
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</refsect1>
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<refsect1 role="examples">
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&reftitle.examples;
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<example xml:id="array_first.example.basic">
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<title>基础 <function>array_first</function> 用法</title>
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<programlisting role="php">
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<![CDATA[
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<?php
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$array = [1 => 'a', 0 => 'b', 3 => 'c', 2 => 'd'];
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$firstValue = array_first($array);
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var_dump($firstValue);
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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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string(1) "a"
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]]>
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</screen>
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</example>
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</refsect1>
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<refsect1 role="seealso">
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&reftitle.seealso;
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<simplelist>
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<member><function>array_key_first</function></member>
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<member><function>array_last</function></member>
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</simplelist>
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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:"~/.phpdoc/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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