您不需要知道用户的时区，因为帖子发布后的时间与时区无关。

WordPress将您的时区设置为UTC，以便在内部，所有日期都处理相同且一致的时区。您应该避免使用php函数，而是使用WordPress提供的函数。

顺便说一下，human_time_diff() 做你想做的事。。

要获取帖子发布后的时间。。。

//Unix timestamp of post
$gmt_timestamp = get_post_time( \'G\', true, $post );

//Echo time since timestamp in human readable form
printf( __( \'%s ago\' ), human_time_diff( $gmt_timestamp ) );

编辑human_time_diff() 不幸的是，只会持续几天。但这里也有一个估计周、月和年的方法（虽然显然不完全是因为一个月没有固定的天数）。这是未经测试的。

 wpse_human_time_diff($from, $to=\'\'){

      if ( empty($to) )
           $to = time();
      $diff = (int) abs($to - $from);

      if ( $diff <= 3600 ){
            $mins = round($diff / 60);
            if ($mins <= 1) {
                  $mins = 1;
            }

            /* translators: min=minute */
            $since = sprintf(_n(\'%s min\', \'%s mins\', $mins), $mins);

       }elseif( $diff <= 86400 ){
            $hours = round($diff / 3600);
            $since = sprintf(_n(\'%s hour\', \'%s hours\', $hours), $hours);

       }elseif( $diff <= 604800 ) {
            $days = round($diff / 86400);
            $since = sprintf(_n(\'%s day\', \'%s days\', $days), $days);

       }elseif( $diff <= 2592000 ){
            $weeks = round($diff / 604800);
            $since = sprintf(_n(\'%s week\', \'%s weeks\', $weeks), $weeks);

       }elseif( $diff <= 31536000 ){
            $months = round($diff / 2592000);
            $since = sprintf(_n(\'%s month\', \'%s months\', $months), $months);

       }else{
            $years = round($diff / 31536000)
            $since = sprintf(_n(\'%s year\', \'%s years\', $years), $years);
       }

       return $since;

}