您可以创建自己的DateTime
类来扩展默认值DateTime
,从而更改行为:
<?php
class CustomDateTimeVariables {
public static $date = 'now';
}
class CustomDateTime extends DateTime {
public function __construct($time = null, DateTimeZone $timezone = null) {
if ($time === null) {
$time = CustomDateTimeVariables::$date;
}
if ($timezone !== null) {
parent::__construct($time, $timezone);
} else {
parent::__construct($time);
}
}
}
CustomDateTimeVariables::$date = '2010-01-01';
$datetime1 = new CustomDateTime();
CustomDateTimeVariables::$date = '2010-01-02';
$datetime2 = new CustomDateTime();
var_dump($datetime1->Format('Y-m-d H:i:s')); //"2010-01-01 00:00:00"
var_dump($datetime2->Format('Y-m-d H:i:s')); //"2010-01-02 00:00:00"
?>
演示
这样你也可以很容易地设置默认时间(检查CustomDateTimeVariables
):
<?php
class CustomDateTimeVariables {
public static $date = 'now +120 hours';
}
class CustomDateTime extends DateTime {
public function __construct($time = null, DateTimeZone $timezone = null) {
if ($time === null) {
$time = CustomDateTimeVariables::$date;
}
if ($timezone !== null) {
parent::__construct($time, $timezone);
} else {
parent::__construct($time);
}
}
}
$datetime = new CustomDateTime();
var_dump($datetime->Format('Y-m-d H:i:s')); //"2013-10-29 13:37:39"
?>
..当它上线时,您只需将默认设置更改回now
.