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302 lines
9.2 KiB
XML
302 lines
9.2 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
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<!-- $Revision$ -->
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<reference xml:id="class.dateinterval" role="class" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xi="http://www.w3.org/2001/XInclude">
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<title>The DateInterval class</title>
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<titleabbrev>DateInterval</titleabbrev>
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<partintro>
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<!-- {{{ DateInterval intro -->
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<section xml:id="dateinterval.intro">
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&reftitle.intro;
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<para>
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Represents a date interval.
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</para>
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<para>
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A date interval stores either a fixed amount of time (in years, months,
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days, hours etc) or a relative time string in the format that
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<classname>DateTimeImmutable</classname>'s and
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<classname>DateTime</classname>'s constructors support.
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</para>
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<para>
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More specifically, the information in an object of the
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<classname>DateInterval</classname> class is an instruction to get from
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one date/time to another date/time. This process is not always reversible.
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</para>
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<para>
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A common way to create a <classname>DateInterval</classname> object
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is by calculating the difference between two date/time objects through
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<methodname>DateTimeInterface::diff</methodname>.
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</para>
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<para>
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Since there is no well defined way to compare date intervals,
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<classname>DateInterval</classname> instances are
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<link linkend="language.operators.comparison.incomparable">incomparable</link>.
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</para>
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</section>
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<!-- }}} -->
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<section xml:id="dateinterval.synopsis">
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&reftitle.classsynopsis;
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<!-- {{{ Synopsis -->
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<classsynopsis class="class">
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<ooclass>
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<classname>DateInterval</classname>
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</ooclass>
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<classsynopsisinfo role="comment">&Properties;</classsynopsisinfo>
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<fieldsynopsis>
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<modifier>public</modifier>
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<type>int</type>
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<varname linkend="dateinterval.props.y">y</varname>
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</fieldsynopsis>
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<fieldsynopsis>
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<modifier>public</modifier>
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<type>int</type>
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<varname linkend="dateinterval.props.m">m</varname>
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</fieldsynopsis>
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<fieldsynopsis>
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<modifier>public</modifier>
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<type>int</type>
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<varname linkend="dateinterval.props.d">d</varname>
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</fieldsynopsis>
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<fieldsynopsis>
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<modifier>public</modifier>
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<type>int</type>
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<varname linkend="dateinterval.props.h">h</varname>
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</fieldsynopsis>
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<fieldsynopsis>
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<modifier>public</modifier>
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<type>int</type>
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<varname linkend="dateinterval.props.i">i</varname>
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</fieldsynopsis>
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<fieldsynopsis>
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<modifier>public</modifier>
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<type>int</type>
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<varname linkend="dateinterval.props.s">s</varname>
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</fieldsynopsis>
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<fieldsynopsis>
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<modifier>public</modifier>
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<type>float</type>
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<varname linkend="dateinterval.props.f">f</varname>
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</fieldsynopsis>
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<fieldsynopsis>
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<modifier>public</modifier>
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<type>int</type>
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<varname linkend="dateinterval.props.invert">invert</varname>
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</fieldsynopsis>
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<fieldsynopsis>
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<modifier>public</modifier>
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<type>mixed</type>
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<varname linkend="dateinterval.props.days">days</varname>
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</fieldsynopsis>
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<fieldsynopsis>
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<modifier>public</modifier>
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<type>bool</type>
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<varname linkend="dateinterval.props.from-string">from_string</varname>
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</fieldsynopsis>
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<fieldsynopsis>
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<modifier>public</modifier>
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<type>string</type>
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<varname linkend="dateinterval.props.date-string">date_string</varname>
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</fieldsynopsis>
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<classsynopsisinfo role="comment">&Methods;</classsynopsisinfo>
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<xi:include xpointer="xmlns(db=http://docbook.org/ns/docbook) xpointer(id('class.dateinterval')/db:refentry/db:refsect1[@role='description']/descendant::db:constructorsynopsis[@role='DateInterval'])">
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<xi:fallback/>
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</xi:include>
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<xi:include xpointer="xmlns(db=http://docbook.org/ns/docbook) xpointer(id('class.dateinterval')/db:refentry/db:refsect1[@role='description']/descendant::db:methodsynopsis[@role='DateInterval'])">
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<xi:fallback/>
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</xi:include>
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</classsynopsis>
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<!-- }}} -->
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</section>
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<section xml:id="dateinterval.props">
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&reftitle.properties;
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<warning>
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<para>
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The available properties listed below depend on PHP version, and should
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be considered as <emphasis>readonly</emphasis>.
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</para>
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</warning>
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<variablelist>
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<varlistentry xml:id="dateinterval.props.y">
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<term><varname>y</varname></term>
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<listitem>
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<para>
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Number of years.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry xml:id="dateinterval.props.m">
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<term><varname>m</varname></term>
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<listitem>
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<para>
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Number of months.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry xml:id="dateinterval.props.d">
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<term><varname>d</varname></term>
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<listitem>
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<para>
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Number of days.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry xml:id="dateinterval.props.h">
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<term><varname>h</varname></term>
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<listitem>
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<para>
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Number of hours.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry xml:id="dateinterval.props.i">
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<term><varname>i</varname></term>
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<listitem>
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<para>
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Number of minutes.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry xml:id="dateinterval.props.s">
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<term><varname>s</varname></term>
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<listitem>
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<para>
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Number of seconds.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry xml:id="dateinterval.props.f">
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<term><varname>f</varname></term>
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<listitem>
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<para>
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Number of microseconds, as a fraction of a second.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry xml:id="dateinterval.props.invert">
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<term><varname>invert</varname></term>
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<listitem>
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<para>
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Is <literal>1</literal> if the interval
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represents a negative time period and
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<literal>0</literal> otherwise.
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See <methodname>DateInterval::format</methodname>.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry xml:id="dateinterval.props.days">
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<term><varname>days</varname></term>
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<listitem>
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<para>
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If the DateInterval object was created by
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<methodname>DateTimeImmutable::diff</methodname> or
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<methodname>DateTime::diff</methodname>, then this is the
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total number of full days between the start and end dates. Otherwise,
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<varname>days</varname> will be &false;.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry xml:id="dateinterval.props.from-string">
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<term><varname>from_string</varname></term>
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<listitem>
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<para>
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If the DateInterval object was created by
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<methodname>DateInterval::createFromDateString</methodname>, then
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this property's value will be &true;, and the
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<varname>date_string</varname> property will be populated. Otherwise,
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the value will be &false;, and the <varname>y</varname> to
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<varname>f</varname>, <varname>invert</varname>, and
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<varname>days</varname> properties will be populated.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry xml:id="dateinterval.props.date-string">
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<term><varname>date_string</varname></term>
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<listitem>
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<para>
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The string used as argument to
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<methodname>DateInterval::createFromDateString</methodname>.
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</section>
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<section role="changelog" xml:id="dateinterval.changelog"><!-- {{{ -->
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&reftitle.changelog;
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<para>
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<informaltable>
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<tgroup cols="2">
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<thead>
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<row>
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<entry>&Version;</entry>
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<entry>&Description;</entry>
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</row>
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</thead>
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<tbody>
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<row>
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<entry>8.2.0</entry>
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<entry>
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The <varname>from_string</varname> and <varname>date_string</varname>
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properties were added for <classname>DateInterval</classname>
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instances that were created using the
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<methodname>DateInterval::createFromDateString</methodname> method.
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</entry>
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</row>
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<row>
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<entry>8.2.0</entry>
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<entry>
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Only the <literal>y</literal> to <literal>f</literal>,
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<literal>invert</literal>, and <literal>days</literal> will be visible.
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</entry>
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</row>
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<row>
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<entry>7.4.0</entry>
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<entry>
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<classname>DateInterval</classname> instances are incomparable now;
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previously, all <classname>DateInterval</classname> instances were considered equal.
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</entry>
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</row>
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<row>
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<entry>7.1.0</entry>
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<entry>The <varname>f</varname> property was added.</entry>
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</row>
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</tbody>
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</tgroup>
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</informaltable>
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</para>
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</section><!-- }}} -->
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</partintro>
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&reference.datetime.entities.dateinterval;
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</reference>
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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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