DateTime::__wakeup()

DateTimeImmutable::__wakeup

DateTimeInterface::__wakeup

(PHP 5 >= 5.3.0, PHP 7)

The __wakeup handler

说明

publicDateTime::__wakeup(void)

publicDateTimeImmutable::__wakeup(void)

publicDateTimeInterface::__wakeup(void)

The__wakeup()handler.

参数

此函数没有参数。

返回值

Initializes a DateTime object.

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.