对于 PHP 5.2 的 DateTime：:d iff（）可以使用什么？

php php-5.2

2022-08-30 16:30:12

有没有与 PHP 5.2 中的 DateTime：:d iff（）等效的函数？

我的本地服务器是PHP 5.3，使用DateTime：:d iff（）。然后我发现我的实时站点使用PHP 5.2并给出错误。

Fatal error: Call to undefined method DateTime::diff() in /var/www/some/other/dir/web/daikon/modules/projects/views/admin/log/admin_log_list.php on line 40

PHP 代码：

 foreach ($logs as $key => $list){
 ...
 // show date in European way dd-mm-yyyy not in MySQL way yyyy-mm-dd
    $newdate =new DateTime($list['date']) ;
    echo "<td class=\"left\" width=\"8%\">".$newdate->format('d-m-Y')."</td>\n";
    $starttime = new DateTime($list['start_time']);
    echo "<td width=\"7%\">".date_format($starttime, 'H:i')."</td>\n";
    $finishtime = new DateTime($list['finish_time']);
    echo "<td width=\"8%\">".date_format($finishtime, 'H:i')."</td>\n";
    $timediff = 0;
    $interval = $starttime->diff($finishtime);
    $hours   = $interval->format('%h');
    $minutes = $interval->format('%i');
    $timediff = $hours * 60 + $minutes;

答案 1

Spudley的答案对我不起作用 - 从另一个日期中减去任何日期时间都会在我的系统上得到0。

我能够通过使用DateTime：：format和“U”说明符（自Unix时代以来的几秒钟）来使其工作：

$start = new DateTime('2010-10-12');
$end = new DateTime();
$days = round(($end->format('U') - $start->format('U')) / (60*60*24));

这适用于我的开发系统（5.3.4）和部署系统（5.2.11）。

答案 2

我只是需要一个WordPress插件（不幸的是）。这个我用了2次函数：

在我的类中调用 ->diff（） （我的类扩展了 DateTime，所以 $this 是引用 DateTime )

function diff ($secondDate){
    $firstDateTimeStamp = $this->format("U");
    $secondDateTimeStamp = $secondDate->format("U");
    $rv = ($secondDateTimeStamp - $firstDateTimeStamp);
    $di = new DateInterval($rv);
    return $di;
}

然后我重新创建了一个假的DateInterval类（因为DateInterval仅在PHP>= 5.3中有效），如下所示：

Class DateInterval {
    /* Properties */
    public $y = 0;
    public $m = 0;
    public $d = 0;
    public $h = 0;
    public $i = 0;
    public $s = 0;

    /* Methods */
    public function __construct ( $time_to_convert /** in seconds */) {
        $FULL_YEAR = 60*60*24*365.25;
        $FULL_MONTH = 60*60*24*(365.25/12);
        $FULL_DAY = 60*60*24;
        $FULL_HOUR = 60*60;
        $FULL_MINUTE = 60;
        $FULL_SECOND = 1;

//        $time_to_convert = 176559;
        $seconds = 0;
        $minutes = 0;
        $hours = 0;
        $days = 0;
        $months = 0;
        $years = 0;

        while($time_to_convert >= $FULL_YEAR) {
            $years ++;
            $time_to_convert = $time_to_convert - $FULL_YEAR;
        }

        while($time_to_convert >= $FULL_MONTH) {
            $months ++;
            $time_to_convert = $time_to_convert - $FULL_MONTH;
        }

        while($time_to_convert >= $FULL_DAY) {
            $days ++;
            $time_to_convert = $time_to_convert - $FULL_DAY;
        }

        while($time_to_convert >= $FULL_HOUR) {
            $hours++;
            $time_to_convert = $time_to_convert - $FULL_HOUR;
        }

        while($time_to_convert >= $FULL_MINUTE) {
            $minutes++;
            $time_to_convert = $time_to_convert - $FULL_MINUTE;
        }

        $seconds = $time_to_convert; // remaining seconds
        $this->y = $years;
        $this->m = $months;
        $this->d = $days;
        $this->h = $hours;
        $this->i = $minutes;
        $this->s = $seconds;
    }
}

希望能帮助别人。

对于 PHP 5.2 的 DateTime：:d iff（） 可以使用什么？

对于 PHP 5.2 的 DateTime：:d iff（）可以使用什么？