php教程

DateTime::__wakeup

DateTimeImmutable::__wakeup

DateTimeInterface::__wakeup

(PHP 5 >= 5.3.0, PHP 7)

DateTime::__wakeup -- DateTimeImmutable::__wakeup -- DateTimeInterface::__wakeupThe __wakeup handler

说明

public DateTime::__wakeup ( void )
public DateTimeImmutable::__wakeup ( void )
public DateTimeInterface::__wakeup ( void )

The __wakeup() handler.

参数

此函数没有参数。

返回值

Initializes a DateTime object.

User Contributed Notes

prikkeldraad at gmail dot com 19-Jun-2009 08:14
If you use a version prior to 5.3 you can make __wakeup and __toString work using the following piece of code.

<?php
class ExtendedDateTime extends DateTime {
    private
$_date_time;
   
    public function
__toString() {
        return
$this->format('c'); // format as ISO 8601
   
}
   
    public function
__sleep() {
       
$this->_date_time = $this->format('c');
        return array(
'_date_time');
    }
   
    public function
__wakeup() {
       
$this->__construct($this->_date_time);
    }
}
?>

Hope this helps someone.

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