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clear.xml
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clear.xml
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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<refentry xml:id="intlcalendar.clear" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
<refnamediv>
<refname>IntlCalendar::clear</refname>
<refpurpose>Clear a field or all fields</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<para>
&style.oop;
</para>
<methodsynopsis role="IntlCalendar">
<modifier>public</modifier> <type>true</type><methodname>IntlCalendar::clear</methodname>
<methodparam choice="opt"><type class="union"><type>int</type><type>null</type></type><parameter>field</parameter><initializer>&null;</initializer></methodparam>
</methodsynopsis>
<para>
&style.procedural;
</para>
<methodsynopsis>
<type>true</type><methodname>intlcal_clear</methodname>
<methodparam><type>IntlCalendar</type><parameter>calendar</parameter></methodparam>
<methodparam choice="opt"><type class="union"><type>int</type><type>null</type></type><parameter>field</parameter><initializer>&null;</initializer></methodparam>
</methodsynopsis>
<para>
Clears either all of the fields or a specific field. A cleared field is
marked as unset, giving it the lowest priority against overlapping fields or
even default values when calculating the time. Additionally, its value is set
to <literal>0</literal>, though given the fieldʼs low priority, its value may
have been internally set to another value by the time the field has finished
been queried.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<variablelist>
<varlistentry>
<term><parameter>calendar</parameter></term>
<listitem>
&intl.parameter.intl-calendar;
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>field</parameter></term>
<listitem>
&reference.intl.incfieldparam;
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
&return.true.always;
</para>
</refsect1>
<refsect1 role="changelog">
&reftitle.changelog;
<para>
<informaltable>
<tgroup cols="2">
<thead>
<row>
<entry>&Version;</entry>
<entry>&Description;</entry>
</row>
</thead>
<tbody>
&return.type.true;
</tbody>
</tgroup>
</informaltable>
</para>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<para>
<example>
<title><function>IntlCalendar::clear</function> examples</title>
<programlisting role="php">
<![CDATA[
<?php
ini_set('intl.default_locale', 'es_ES');
ini_set('date.timezone', 'UTC');
$fields = array(
'FIELD_ERA' => 0,
'FIELD_YEAR' => 1,
'FIELD_MONTH' => 2,
'FIELD_WEEK_OF_YEAR' => 3,
'FIELD_WEEK_OF_MONTH' => 4,
'FIELD_DATE' => 5,
'FIELD_DAY_OF_YEAR' => 6,
'FIELD_DAY_OF_WEEK' => 7,
'FIELD_DAY_OF_WEEK_IN_MONTH' => 8,
'FIELD_AM_PM' => 9,
'FIELD_HOUR' => 10,
'FIELD_HOUR_OF_DAY' => 11,
'FIELD_MINUTE' => 12,
'FIELD_SECOND' => 13,
'FIELD_MILLISECOND' => 14,
'FIELD_ZONE_OFFSET' => 15,
'FIELD_DST_OFFSET' => 16,
'FIELD_YEAR_WOY' => 17,
'FIELD_DOW_LOCAL' => 18,
'FIELD_EXTENDED_YEAR' => 19,
'FIELD_JULIAN_DAY' => 20,
'FIELD_MILLISECONDS_IN_DAY' => 21,
'FIELD_IS_LEAP_MONTH' => 22,
'FIELD_FIELD_COUNT' => 23,
);
function getSetFields(IntlCalendar $cal) {
global $fields;
$ret = array();
foreach ($fields as $name => $value) {
if ($cal->isSet($value)) {
$ret[] = $name;
}
}
return $ret;
}
$cal = new IntlGregorianCalendar(2013, 2 /* March */, 15);
echo "After GregorianCalendar creation\n";
print_r(getSetFields($cal));
echo "\n";
echo IntlDateFormatter::formatObject($cal), "\n";
echo "After the formatter requested the extended year\n";
print_r(getSetFields($cal));
echo "\n";
$cal->clear(IntlCalendar::FIELD_YEAR);
echo "After the year has been cleared, the date stays the same\n";
echo IntlDateFormatter::formatObject($cal), "\n";
echo "because FIELD_EXTENDED_YEAR is still set\n";
print_r(getSetFields($cal));
echo "\n";
var_dump($cal->clear(IntlCalendar::FIELD_EXTENDED_YEAR));
echo "After the extended year has been cleared\n";
print_r(getSetFields($cal));
echo IntlDateFormatter::formatObject($cal), "\n";
echo "\n";
echo "After the fields are recalculated,\n"
. " extended year is set again (to 1970)\n";
print_r(getSetFields($cal));
echo "\n";
$cal->clear();
echo "After calling variant with no arguments\n";
print_r(getSetFields($cal));
echo IntlDateFormatter::formatObject($cal), "\n";
]]>
</programlisting>
&example.outputs;
<screen>
<![CDATA[
After GregorianCalendar creation
Array
(
[0] => FIELD_ERA
[1] => FIELD_YEAR
[2] => FIELD_MONTH
[3] => FIELD_DATE
)
15/03/2013 00:00:00
After the formatter requested the extended year
Array
(
[0] => FIELD_ERA
[1] => FIELD_YEAR
[2] => FIELD_MONTH
[3] => FIELD_DATE
[4] => FIELD_EXTENDED_YEAR
)
After the year has been cleared, the date stays the same
15/03/2013 00:00:00
because FIELD_EXTENDED_YEAR is still set
Array
(
[0] => FIELD_ERA
[1] => FIELD_MONTH
[2] => FIELD_DATE
[3] => FIELD_EXTENDED_YEAR
)
bool(true)
After the extended year has been cleared
Array
(
[0] => FIELD_ERA
[1] => FIELD_MONTH
[2] => FIELD_DATE
)
15/03/1970 00:00:00
After the fields are recalculated,
extended year is set again (to 1970)
Array
(
[0] => FIELD_ERA
[1] => FIELD_MONTH
[2] => FIELD_DATE
[3] => FIELD_EXTENDED_YEAR
)
After calling variant with no arguments
Array
(
)
01/01/1970 00:00:00
]]>
</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
-->