新的DateTime，但是当前小时

Question

I've got a method which can return me the current datetime, or another one depending on a given date.

I want to set the other date to the same time as now.

Here's my code :

/**
 * @param string $date
 * @return string
 */
function getDateFormatted($date = '')
{
    if (preg_match('#^[0-9]{4}-[0-9]{2}-[0-9]{2}$#', $date)) {
        $currentDate = new DateTime();
        $date        = new DateTime($date);
        $date->setTime(
            $currentDate->format('H'),
            $currentDate->format('i'),
            $currentDate->format('s')
        );
    } else {
        $date = new DateTime();
    }

    return $date->format('Y-m-d H:i:s');
}

$date      = getDateFormatted();
$otherDate = getDateFormatted('2017-09-01');

It works, but it bugs me to have to use the $currentDate to extract its hours, minutes and seconds.

Is there another, neater way to do it ?

Answer 1

When using DateTime::createFromFormat, all information not present in the format will be set to the current time. It also saves you the manual format verification. So:

function getFormattedDate($date) {
    $ts = DateTime::createFromFormat('Y-m-d', $date) ?: new DateTime;
    return $ts->format('Y-m-d H:i:s');
}