get_post_datetime

WordPress Version: 6.1

/**
 * Retrieves post published or modified time as a `DateTimeImmutable` object instance.
 *
 * The object will be set to the timezone from WordPress settings.
 *
 * For legacy reasons, this function allows to choose to instantiate from local or UTC time in database.
 * Normally this should make no difference to the result. However, the values might get out of sync in database,
 * typically because of timezone setting changes. The parameter ensures the ability to reproduce backwards
 * compatible behaviors in such cases.
 *
 * @since 5.3.0
 *
 * @param int|WP_Post $post   Optional. Post ID or post object. Default is global `$post` object.
 * @param string      $field  Optional. Published or modified time to use from database. Accepts 'date' or 'modified'.
 *                            Default 'date'.
 * @param string      $source Optional. Local or UTC time to use from database. Accepts 'local' or 'gmt'.
 *                            Default 'local'.
 * @return DateTimeImmutable|false Time object on success, false on failure.
 */
function get_post_datetime($post = null, $field = 'date', $source = 'local')
{
    $post = get_post($post);
    if (!$post) {
        return false;
    }
    $wp_timezone = wp_timezone();
    if ('gmt' === $source) {
        $time = ('modified' === $field) ? $post->post_modified_gmt : $post->post_date_gmt;
        $timezone = new DateTimeZone('UTC');
    } else {
        $time = ('modified' === $field) ? $post->post_modified : $post->post_date;
        $timezone = $wp_timezone;
    }
    if (empty($time) || '0000-00-00 00:00:00' === $time) {
        return false;
    }
    $datetime = date_create_immutable_from_format('Y-m-d H:i:s', $time, $timezone);
    if (false === $datetime) {
        return false;
    }
    return $datetime->setTimezone($wp_timezone);
}