Macros additional useful methods to PHP Carbon package.

carbon-macros.php

<?php

/**
 * 給定時間日期是否合法
 *
 * @param string|null              $time
 * @param \DateTimeZone|string|null $tz
 * @return bool
 */
Carbon::macro('recognized', function ($time = null, $tz = null) {
    return (bool) @static::parse($time, $tz);
});

/**
 * 給定時間日期是否「不」合法
 *
 * @param string|null              $time
 * @param \DateTimeZone|string|null $tz
 * @return bool
 */
Carbon::macro('unrecognized', function ($time = null, $tz = null) {
    return ! static::recognized(...func_get_args());
});