IntlCalendar::clear

(PHP 5 >= 5.5.0, PHP 7, PHP 8, PECL >= 3.0.0a1)

IntlCalendar::clear — Clear a field or all fields

说明

面向对象风格

public IntlCalendar::clear(?int $field = null): bool

过程化风格

intlcal_clear(IntlCalendar $calendar, ?int $field = null): bool

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 0, 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.

参数

calendar: IntlCalendar 实例。
field: One of the IntlCalendar date/time field constants. These are integer values between 0 and IntlCalendar::FIELD_COUNT.

返回值

总是返回 true 。

范例

示例 #1 IntlCalendar::clear() examples


<?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";

以上例程会输出：

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

add a note

User Contributed Notes

There are no user contributed notes for this page.

官方地址：https://www.php.net/manual/en/intlcalendar.clear.php

有任何技术问题请点击这里网站运营推广招聘

IT PHP 编程语言 Linux 科技开发编程 Elasticsearch HTML/CSS/XML 网络 JAVA NoSQL C/C++ 面试数据库 Golang Git 算法正则表达式操作系统 Redis 互联网 MySql JavaScript 运维软件架构设计 Mac OS 国际 TCP/IP Excel Vim Windows Socket Oracle VR MongoDB 运营 Python MemCache 商业硬件电子设计 nginx 娱乐摄影游戏 WordPress HTTP 团建数码电器

php7 安装fileinfo扩展 preg_split — 通过一个正则表达式分隔字符串 [PHP] inet_pton/inet_ntop IP地址转换函数 php位值,解决 PHP 中 usort 在值相同时改变原始位置的问题 PHPMailer设置utf8 PHPMailer字符集CharSet 如何在Composer中为GitLab实例设置访问令牌 array_multisort() 多字段排序 laravel框架查看sql语句方式 [原创]诡异的php-fpm超时问题 PHP获取指定函数定义在哪个文件中及行号利用php soap实现web service php设置cookie为httponly防止xss攻击 PHP5 扩展SOAP 调用 webservice PHP-FPM进程数的设定 PHP7添加redis扩展利用PHP SOAP实现WEB SERVICE PHP - mysql_real_escape_string()与mysql_escape_string() 的区别 ADORecordSet对象 PHPstorm 里面Terminal 不能使用 esc键吗退出编辑模式吗纯php实现DES以及TripleDES加密算法

略微加速

PHP官方手册 - 互联网笔记

IntlCalendar::clear

说明

参数

返回值

范例

User Contributed Notes