php实现的太平洋时间和北京时间互转的自定义函

/**

 * 太平洋时间转北京时间

 */

public function pacificToPRC($time=''){

 date_default_timezone_set('Pacific/Apia');

 if(empty($time)){

 $time = time();

 }

 date_default_timezone_set('Asia/Shanghai');

 $date = date('Y-m-d H:i:s',$time);

 $time = strtotime($date);

 return $time;

}
/**

 * 北京时间转太平洋时间

 * @param unknown_type $time

 */

public function PRCToPacific($time=''){

 if(empty($time)){

 date_default_timezone_set('Asia/Shanghai');

 $time = time();

 }

 date_default_timezone_set('Pacific/Apia');

 $date = date('Y-m-d H:i:s',$time);

 $time = strtotime($date);

 return $time;

}