mirror of
https://github.com/php/doc-es.git
synced 2026-03-24 07:22:16 +01:00
cfd4751d62
* Document PHP 8.4.0 change to http_build_query() in relation to BackedEnums * Remove useless wrapping para tag and update EN-Revision * Various amendements to follow-up on GH-4936 * Improve session_gc documentation * docs: update windows recommended page with corrected info * Install from source: Point to README.md for instructions
157 lines
4.8 KiB
XML
157 lines
4.8 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
|
|
<!-- $Revision$ -->
|
|
<!-- EN-Revision: cd8b964b8566801265f0d287db6eb651f93be950 Maintainer: PhilDaiguille Status: ready -->
|
|
<!-- Reviewed: no Maintainer: Marqitos -->
|
|
<chapter xml:id="datetime.examples" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
|
|
&reftitle.examples;
|
|
|
|
<section xml:id="datetime.examples-arithmetic">
|
|
<title>Aritmética con DateTime</title>
|
|
<para>
|
|
Los ejemplos siguientes muestran algunos problemas de la aritmética de DateTime en lo que respecta
|
|
a las transiciones DST y los meses con diferente número de días.
|
|
</para>
|
|
<para>
|
|
<example>
|
|
<title>DateTimeImmutable::add/sub añadir un intervalo de tiempo transcurrido</title>
|
|
<simpara>
|
|
Añadir PT24H más allá de una transición DST parecerá añadir 23/25 horas
|
|
(para la mayoría de los husos horarios).
|
|
</simpara>
|
|
<programlisting role="php">
|
|
<![CDATA[
|
|
<?php
|
|
$dt = new DateTimeImmutable("2015-11-01 00:00:00", new DateTimeZone("America/New_York"));
|
|
echo "Start: ", $dt->format("Y-m-d H:i:s P"), PHP_EOL;
|
|
$dt = $dt->add(new DateInterval("PT3H"));
|
|
echo "End: ", $dt->format("Y-m-d H:i:s P"), PHP_EOL;
|
|
]]>
|
|
</programlisting>
|
|
&example.outputs;
|
|
<screen>
|
|
<![CDATA[
|
|
Start: 2015-11-01 00:00:00 -04:00
|
|
End: 2015-11-01 02:00:00 -05:00
|
|
]]>
|
|
</screen>
|
|
</example>
|
|
</para>
|
|
<para>
|
|
<example>
|
|
<title>DateTimeImmutable::modify y strtotime incrementar o decrementar valores individuales</title>
|
|
<simpara>
|
|
Añadir +24 horas más allá de una transición DST puede añadir exactamente 24
|
|
horas como se ve con la cadena fecha/hora
|
|
(excepto si la hora de inicio o fin está en un punto de transición).
|
|
</simpara>
|
|
<programlisting role="php">
|
|
<![CDATA[
|
|
<?php
|
|
$dt = new DateTimeImmutable("2015-11-01 00:00:00", new DateTimeZone("America/New_York"));
|
|
echo "Start: ", $dt->format("Y-m-d H:i:s P"), PHP_EOL;
|
|
$dt = $dt->modify("+24 hours");
|
|
echo "End: ", $dt->format("Y-m-d H:i:s P"), PHP_EOL;
|
|
]]>
|
|
</programlisting>
|
|
&example.outputs;
|
|
<screen>
|
|
<![CDATA[
|
|
Start: 2015-11-01 00:00:00 -04:00
|
|
End: 2015-11-02 00:00:00 -05:00
|
|
]]>
|
|
</screen>
|
|
</example>
|
|
</para>
|
|
<para>
|
|
<example>
|
|
<title>La adición o sustracción de fechas/horas puede exceder
|
|
(en más o en menos) fechas</title>
|
|
<simpara>
|
|
Como para 31 de Enero + 1 mes dará como resultado 2 de Marzo (año bisiesto) o
|
|
3 de Marzo (año normal).
|
|
</simpara>
|
|
<programlisting role="php">
|
|
<![CDATA[
|
|
<?php
|
|
echo "Normal year:\n"; // February has 28 days
|
|
$dt = new DateTimeImmutable("2015-01-31 00:00:00", new DateTimeZone("America/New_York"));
|
|
echo "Start: ", $dt->format("Y-m-d H:i:s P"), PHP_EOL;
|
|
$dt = $dt->modify("+1 month");
|
|
echo "End: ", $dt->format("Y-m-d H:i:s P"), PHP_EOL;
|
|
|
|
echo "Leap year:\n"; // February has 29 days
|
|
$dt = new DateTimeImmutable("2016-01-31 00:00:00", new DateTimeZone("America/New_York"));
|
|
echo "Start: ", $dt->format("Y-m-d H:i:s P"), PHP_EOL;
|
|
$dt = $dt->modify("+1 month");
|
|
echo "End: ", $dt->format("Y-m-d H:i:s P"), PHP_EOL;
|
|
]]>
|
|
</programlisting>
|
|
&example.outputs;
|
|
<screen>
|
|
<![CDATA[
|
|
Normal year:
|
|
Start: 2015-01-31 00:00:00 -05:00
|
|
End: 2015-03-03 00:00:00 -05:00
|
|
Leap year:
|
|
Start: 2016-01-31 00:00:00 -05:00
|
|
End: 2016-03-02 00:00:00 -05:00
|
|
]]>
|
|
</screen>
|
|
<simpara>
|
|
Para obtener el último día del mes próximo (es decir, para prever el
|
|
excedente), el formato <literal>last day of</literal> está disponible.
|
|
</simpara>
|
|
<programlisting role="php">
|
|
<![CDATA[
|
|
<?php
|
|
echo "Normal year:\n"; // February has 28 days
|
|
$dt = new DateTimeImmutable("2015-01-31 00:00:00", new DateTimeZone("America/New_York"));
|
|
echo "Start: ", $dt->format("Y-m-d H:i:s P"), PHP_EOL;
|
|
$dt = $dt->modify("last day of next month");
|
|
echo "End: ", $dt->format("Y-m-d H:i:s P"), PHP_EOL;
|
|
|
|
echo "Leap year:\n"; // February has 29 days
|
|
$dt = new DateTimeImmutable("2016-01-31 00:00:00", new DateTimeZone("America/New_York"));
|
|
echo "Start: ", $dt->format("Y-m-d H:i:s P"), PHP_EOL;
|
|
$dt = $dt->modify("last day of next month");
|
|
echo "End: ", $dt->format("Y-m-d H:i:s P"), PHP_EOL;
|
|
]]>
|
|
</programlisting>
|
|
&example.outputs;
|
|
<screen>
|
|
<![CDATA[
|
|
Normal year:
|
|
Start: 2015-01-31 00:00:00 -05:00
|
|
End: 2015-02-28 00:00:00 -05:00
|
|
Leap year:
|
|
Start: 2016-01-31 00:00:00 -05:00
|
|
End: 2016-02-29 00:00:00 -05:00
|
|
]]>
|
|
</screen>
|
|
</example>
|
|
</para>
|
|
</section>
|
|
|
|
</chapter>
|
|
|
|
<!-- 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
|
|
-->
|