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https://github.com/php/doc-fr.git
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235 lines
7.3 KiB
XML
235 lines
7.3 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
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<!-- EN-Revision: 3a8c3e77df070a046c9d5b56b68926ca2d7e5ee3 Maintainer: Fan2Shrek Status: ready -->
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<!-- Reviewed: yes -->
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<refentry xml:id="datetime.diff" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
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<refnamediv>
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<refname>DateTimeInterface::diff</refname>
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<refname>DateTimeImmutable::diff</refname>
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<refname>DateTime::diff</refname>
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<refname>date_diff</refname>
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<refpurpose>Retourne la différence entre deux objets DateTime</refpurpose>
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</refnamediv>
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<refsect1 role="description">
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&reftitle.description;
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<para>&style.oop;</para>
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<methodsynopsis role="DateTimeInterface">
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<modifier>public</modifier> <type>DateInterval</type><methodname>DateTimeInterface::diff</methodname>
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<methodparam><type>DateTimeInterface</type><parameter>targetObject</parameter></methodparam>
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<methodparam choice="opt"><type>bool</type><parameter>absolute</parameter><initializer>&false;</initializer></methodparam>
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</methodsynopsis>
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<methodsynopsis role="DateTimeImmutable">
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<modifier>public</modifier> <type>DateInterval</type><methodname>DateTimeImmutable::diff</methodname>
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<methodparam><type>DateTimeInterface</type><parameter>targetObject</parameter></methodparam>
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<methodparam choice="opt"><type>bool</type><parameter>absolute</parameter><initializer>&false;</initializer></methodparam>
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</methodsynopsis>
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<methodsynopsis role="DateTime">
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<modifier>public</modifier> <type>DateInterval</type><methodname>DateTime::diff</methodname>
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<methodparam><type>DateTimeInterface</type><parameter>targetObject</parameter></methodparam>
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<methodparam choice="opt"><type>bool</type><parameter>absolute</parameter><initializer>&false;</initializer></methodparam>
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</methodsynopsis>
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<para>&style.procedural;</para>
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<methodsynopsis>
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<type>DateInterval</type><methodname>date_diff</methodname>
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<methodparam><type>DateTimeInterface</type><parameter>baseObject</parameter></methodparam>
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<methodparam><type>DateTimeInterface</type><parameter>targetObject</parameter></methodparam>
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<methodparam choice="opt"><type>bool</type><parameter>absolute</parameter><initializer>&false;</initializer></methodparam>
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</methodsynopsis>
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<para>
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Retourne la différence entre deux objets <classname>DateTimeInterface</classname>.
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</para>
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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>datetime</parameter></term>
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<listitem>
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<para>
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La date à comparer.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><parameter>absolute</parameter></term>
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<listitem>
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<para>
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Doit-on forcer l'intervalle à être positif ?
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</para>
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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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<para>
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L'objet <classname>DateInterval</classname> représente la différence
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entre les deux dates.
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</para>
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<para>
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Le paramètre <parameter>absolute</parameter> affecte uniquement la propriété
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<parameter>invert</parameter> d'un objet <classname>DateInterval</classname>.
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</para>
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<para>
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La valeur de retour représente de façon plus détaillée l'intervalle de temps
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à appliquer sur l'objet original (<parameter>$this</parameter> ou
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<parameter>$originObject</parameter>) pour arriver à
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<parameter>$targetObject</parameter>. Cette procédure n'est pas toujours
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réversible.
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</para>
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<para>
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La méthode est consciente des changements d'heure d'été et peut donc renvoyer
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un intervalle de <literal>24 heures et 30 minutes</literal>, comme dans l'un
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des exemples. Si l'on souhaite calculer avec le temps absolu, il faut
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d'abord convertir à la fois <parameter>$this</parameter>/
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<parameter>$baseObject</parameter> et <parameter>$targetObject</parameter>
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en UTC.
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</para>
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</refsect1>
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<refsect1 role="examples">
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&reftitle.examples;
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<example>
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<title>Exemple avec <function>DateTimeImmutable::diff</function></title>
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<para>&style.oop;</para>
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<programlisting role="php">
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<![CDATA[
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<?php
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$origin = new DateTimeImmutable('2009-10-11');
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$target = new DateTimeImmutable('2009-10-13');
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$interval = $origin->diff($target);
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echo $interval->format('%R%a days');
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]]>
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</programlisting>
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&example.outputs;
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<screen>
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<![CDATA[
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+2 days
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]]>
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</screen>
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<para>&style.procedural;</para>
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<programlisting role="php">
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<![CDATA[
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<?php
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$origin = date_create('2009-10-11');
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$target = date_create('2009-10-13');
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$interval = date_diff($origin, $target);
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echo $interval->format('%R%a days');
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]]>
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</programlisting>
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&example.outputs;
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<screen>
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<![CDATA[
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+2 days
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]]>
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</screen>
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</example>
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<example>
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<title><methodname>DateTimeInterface::diff</methodname> lors du passage à
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l'heure d'été</title>
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<programlisting role="php">
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<![CDATA[
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<?php
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$originalTime = new DateTimeImmutable("2021-10-30 09:00:00 Europe/London");
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$targetTime = new DateTimeImmutable("2021-10-31 08:30:00 Europe/London");
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$interval = $originalTime->diff($targetTime);
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echo $interval->format("%H:%I:%S (Full days: %a)"), "\n";
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]]>
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</programlisting>
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&example.outputs;
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<screen>
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<![CDATA[
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24:30:00 (Full days: 0)
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]]>
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</screen>
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</example>
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<example>
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<title>Calcul d'intervalle avec <methodname>DateTimeInterface::diff</methodname></title>
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<para>
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La valeur renvoyée par la méthode est le temps exact qu'il faut pour aller
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de <parameter>$this</parameter> à <parameter>$targetObject</parameter>.
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La comparaison entre le 1er janvier et le 31 décembre renvoie donc 364 jours
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et non 365 (pour les années non bissextiles).
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</para>
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<programlisting role="php">
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<![CDATA[
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<?php
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$originalTime = new DateTimeImmutable("2023-01-01 UTC");
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$targetTime = new DateTimeImmutable("2023-12-31 UTC");
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$interval = $originalTime->diff($targetTime);
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echo "Jours totaux: ", $interval->format("%a"), "\n";
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]]>
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</programlisting>
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&example.outputs;
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<screen>
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<![CDATA[
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Jours totaux: 364
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]]>
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</screen>
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</example>
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<example>
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<title>Comparaison de deux objets <classname>DateTime</classname></title>
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<note>
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<para>
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Les objets <classname>DateTimeImmutable</classname> ou
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<classname>DateTime</classname> peuvent être comparés en utilisant les
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<link linkend="language.operators.comparison">opérateurs de comparaison</link>.
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</para>
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</note>
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<programlisting role="php">
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<![CDATA[
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<?php
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$date1 = new DateTime("now");
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$date2 = new DateTime("tomorrow");
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var_dump($date1 == $date2);
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var_dump($date1 < $date2);
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var_dump($date1 > $date2);
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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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bool(false)
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bool(true)
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bool(false)
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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>DateInterval::format</function></member>
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<member><function>DateTime::add</function></member>
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<member><function>DateTime::sub</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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