/
createfromdatestring.xml
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/
createfromdatestring.xml
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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<refentry xml:id="dateinterval.createfromdatestring" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
<refnamediv>
<refname>DateInterval::createFromDateString</refname>
<refpurpose>Sets up a DateInterval from the relative parts of the string</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<para>&style.oop;</para>
<methodsynopsis role="DateInterval">
<modifier>public</modifier> <modifier>static</modifier> <type class="union"><type>DateInterval</type><type>false</type></type><methodname>DateInterval::createFromDateString</methodname>
<methodparam><type>string</type><parameter>datetime</parameter></methodparam>
</methodsynopsis>
<para>&style.procedural;</para>
<methodsynopsis>
<type class="union"><type>DateInterval</type><type>false</type></type><methodname>date_interval_create_from_date_string</methodname>
<methodparam><type>string</type><parameter>datetime</parameter></methodparam>
</methodsynopsis>
<para>
Uses the date/time parsers as used in the
<classname>DateTimeImmutable</classname> constructor to create a
<classname>DateInterval</classname> from the relative parts of the parsed
string.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>datetime</parameter></term>
<listitem>
<para>
A date with relative parts. Specifically, the <link
linkend="datetime.formats.relative">relative formats</link> supported
by the parser used for <classname>DateTimeImmutable</classname>,
<classname>DateTime</classname>, and <function>strtotime</function>
will be used to construct the DateInterval.
</para>
<para>
To use an ISO-8601 format string like <literal>P7D</literal>, you must
use the constructor.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
Returns a new <classname>DateInterval</classname> instance on success, &return.falseforfailure;.
</para>
</refsect1>
<refsect1 role="changelog">
&reftitle.changelog;
<informaltable>
<tgroup cols="2">
<thead>
<row>
<entry>&Version;</entry>
<entry>&Description;</entry>
</row>
</thead>
<tbody>
<row>
<entry>8.2.0</entry>
<entry>
Only the <literal>from_string</literal> and
<literal>date_string</literal> properties will be visible when a
<classname>DateInterval</classname> is created with this method.
</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<para>
<example>
<title>Parsing valid date intervals</title>
<programlisting role="php">
<![CDATA[
<?php
// Each set of intervals is equal.
$i = new DateInterval('P1D');
$i = DateInterval::createFromDateString('1 day');
$i = new DateInterval('P2W');
$i = DateInterval::createFromDateString('2 weeks');
$i = new DateInterval('P3M');
$i = DateInterval::createFromDateString('3 months');
$i = new DateInterval('P4Y');
$i = DateInterval::createFromDateString('4 years');
$i = new DateInterval('P1Y1D');
$i = DateInterval::createFromDateString('1 year + 1 day');
$i = new DateInterval('P1DT12H');
$i = DateInterval::createFromDateString('1 day + 12 hours');
$i = new DateInterval('PT3600S');
$i = DateInterval::createFromDateString('3600 seconds');
?>
]]>
</programlisting>
</example>
</para>
<para>
<example>
<title>Parsing combinations and negative intervals</title>
<programlisting role="php">
<![CDATA[
<?php
$i = DateInterval::createFromDateString('62 weeks + 1 day + 2 weeks + 2 hours + 70 minutes');
echo $i->format('%d %h %i'), "\n";
$i = DateInterval::createFromDateString('1 year - 10 days');
echo $i->format('%y %d'), "\n";
?>
]]>
</programlisting>
&example.outputs;
<screen role="shell">
449 2 70
1 -10
</screen>
</example>
</para>
<para>
<example>
<title>Parsing special relative date intervals</title>
<programlisting role="php">
<![CDATA[
<?php
$i = DateInterval::createFromDateString('last day of next month');
var_dump($i);
$i = DateInterval::createFromDateString('last weekday');
var_dump($i);
]]>
</programlisting>
&example.outputs.82;
<screen role="php">
<![CDATA[
object(DateInterval)#1 (2) {
["from_string"]=>
bool(true)
["date_string"]=>
string(22) "last day of next month"
}
object(DateInterval)#2 (2) {
["from_string"]=>
bool(true)
["date_string"]=>
string(12) "last weekday"
}
]]>
</screen>
&example.outputs.8.similar;
<screen role="php">
<![CDATA[
object(DateInterval)#1 (16) {
["y"]=>
int(0)
["m"]=>
int(1)
["d"]=>
int(0)
["h"]=>
int(0)
["i"]=>
int(0)
["s"]=>
int(0)
["f"]=>
float(0)
["weekday"]=>
int(0)
["weekday_behavior"]=>
int(0)
["first_last_day_of"]=>
int(2)
["invert"]=>
int(0)
["days"]=>
bool(false)
["special_type"]=>
int(0)
["special_amount"]=>
int(0)
["have_weekday_relative"]=>
int(0)
["have_special_relative"]=>
int(0)
}
object(DateInterval)#2 (16) {
["y"]=>
int(0)
["m"]=>
int(0)
["d"]=>
int(0)
["h"]=>
int(0)
["i"]=>
int(0)
["s"]=>
int(0)
["f"]=>
float(0)
["weekday"]=>
int(0)
["weekday_behavior"]=>
int(0)
["first_last_day_of"]=>
int(0)
["invert"]=>
int(0)
["days"]=>
bool(false)
["special_type"]=>
int(1)
["special_amount"]=>
int(-1)
["have_weekday_relative"]=>
int(0)
["have_special_relative"]=>
int(1)
}
]]>
</screen>
</example>
</para>
</refsect1>
</refentry>
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sgml-default-dtd-file:"~/.phpdoc/manual.ced"
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-->