这就是功能human_time_diff( $from, $to );, 它将比较两个UNIX时间戳。仅使用mktime() 在…上$GLOBALS[\'current_user\']->user_registered; 并将其与当前UNIX时间进行比较。

如果你想更系统地使用脚本，你可以这样做

$timestamp_start = strtotime($startdate);
$timestamp_end = strtotime($enddate);
$difference = abs($timestamp_end - $timestamp_start);

if ($difference >= 2592000){
//send invite code
}

$days = floor($difference/(60*60*24));
echo \'Days \'.$days;

Source

谢谢你的回答，我结合了你的解决方案，它很有效！

human\\u time\\u diff，不适合我的脚本，因为它的返回时间是分钟、小时和天，带有“ago”字样。因此，我创建了自己的函数，该函数只返回天，没有“ago”。

功能代码：

function count_days($from){

    $start_time = $from;
    $current_time = time();

    //convert given date to the unix time (in seconds)
    $unix_start_time = date("U",strtotime($start_time));

    //count the difference between current time and given date
    $diff = (int) abs($current_time - $unix_start_time);

    //Now, we change seconds for days
    if ($diff >= 86400) {
        $days = round($diff / 86400);
        if ($days <= 1) $days = 1;  
    }

    //returns days
    return $days;
}

再次感谢！