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construct.xml
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177 lines (165 loc) · 4.99 KB
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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<!-- EN-Revision: 3a8c3e77df070a046c9d5b56b68926ca2d7e5ee3 Maintainer: Jerry Status: ready -->
<!-- CREDITS: mowangjuanzi -->
<refentry xml:id="datetimezone.construct" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
<refnamediv>
<refname>DateTimeZone::__construct</refname>
<refname>timezone_open</refname>
<refpurpose>创建新的DateTimeZone对象</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<para>&style.oop;</para>
<constructorsynopsis role="DateTimeZone">
<modifier>public</modifier> <methodname>DateTimeZone::__construct</methodname>
<methodparam><type>string</type><parameter>timezone</parameter></methodparam>
</constructorsynopsis>
<para>&style.procedural;</para>
<methodsynopsis>
<type class="union"><type>DateTimeZone</type><type>false</type></type><methodname>timezone_open</methodname>
<methodparam><type>string</type><parameter>timezone</parameter></methodparam>
</methodsynopsis>
<para>
创建新的 DateTimeZone 对象。
</para>
<para>
DateTimeZone 对象提供了对三种不同类型的时区规则访问。UTC 时差（类型 <literal>1</literal>）、时区缩写（类型
<literal>2</literal>）、IANA 时区数据库中公布的<link linkend="timezones">时区标识符</link>（类型 <literal>3</literal>）。
</para>
<para>
DateTimeZone 对象可以附加到 <classname>DateTime</classname> 和 <classname>DateTimeImmutable</classname>
对象上，以便能够在本地时区呈现这些对象所封装的时区。
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>timezone</parameter></term>
<listitem>
<para>
所支持的<link linkend="timezones">时区名</link>之一，时差（+0200）或时区缩写（BSD）。
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
成功时返回 <classname>DateTimeZone</classname> 对象。
&return.falseforfailure.style.procedural;
</para>
</refsect1>
<refsect1 role="errors">
&reftitle.errors;
<para>
如果提供的时区不能识别为有效的时区，此方法将抛出 <exceptionname>DateInvalidTimeZoneException</exceptionname> 异常。在
PHP 8.3 之前，是 <exceptionname>Exception</exceptionname>。
</para>
</refsect1>
<refsect1 role="changelog">
&reftitle.changelog;
<para>
<informaltable>
<tgroup cols="2">
<thead>
<row>
<entry>&Version;</entry>
<entry>&Description;</entry>
</row>
</thead>
<tbody>
<row>
<entry>8.3.0</entry>
<entry>
无效值现在返回 <exceptionname>DateInvalidTimeZoneException</exceptionname>
而不是生成 <exceptionname>Exception</exceptionname>。
</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</para>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<para>
<example>
<title>创建 DateTimeZone 并附加到 DateTimeImmutable</title>
<programlisting role="php">
<![CDATA[
<?php
$d = new DateTimeImmutable("2022-06-02 15:44:48 UTC");
$timezones = [ 'Europe/London', 'GMT+04:45', '-06:00', 'CEST' ];
foreach ($timezones as $tz) {
$tzo = new DateTimeZone($tz);
$local = $d->setTimezone($tzo);
echo $local->format(DateTimeInterface::RFC2822 . ' — e') . "\n";
}
]]>
</programlisting>
&example.outputs;
<screen>
<![CDATA[
Thu, 02 Jun 2022 16:44:48 +0100 — Europe/London
Thu, 02 Jun 2022 20:29:48 +0445 — +04:45
Thu, 02 Jun 2022 09:44:48 -0600 — -06:00
Thu, 02 Jun 2022 17:44:48 +0200 — CEST
]]>
</screen>
</example>
</para>
<para>
<example>
<title>实例化 <classname>DateTimeZone</classname> 时捕捉错误</title>
<programlisting role="php">
<![CDATA[
<?php
// 通过捕获异常来处理错误
$timezones = array('Europe/London', 'Mars/Phobos', 'Jupiter/Europa');
foreach ($timezones as $tz) {
try {
$mars = new DateTimeZone($tz);
echo $mars->getName() . "\n";
} catch(Exception $e) {
echo $e->getMessage() . "\n";
}
}
]]>
</programlisting>
&example.outputs;
<screen>
<![CDATA[
Europe/London
DateTimeZone::__construct() [datetimezone.--construct]: Unknown or bad timezone (Mars/Phobos)
DateTimeZone::__construct() [datetimezone.--construct]: Unknown or bad timezone (Jupiter/Europa)
]]>
</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:"~/.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
-->