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我個人更喜歡使用高級對象而不僅僅是數(shù)組或字符串，所以這是我處理的方式。對于有些人來說，這可能有些過度，我完全理解，不過核心方法也可以很容易地重寫為全局函數(shù)，希望這一點可以考慮到。

我認為整體上非常簡單明了，幾乎與您的代碼完全相同，只是在分割后我們將其轉(zhuǎn)換為整數(shù)，然后驗證小時是否在預期范圍內(nèi)。

readonly class MySqlTime
{
    public function __construct(
        public int $hours,
        public int $minutes,
        public int $seconds,
    ) {
    }

    public static function fromMySqlTimeAsDurationInDay(string $time): self
    {
        [$hours, $minutes, $seconds] = array_map('intval', explode(':', $time));

        // Ensure only positive values on a single day.
        // MySql should already be throwing errors about minutes or seconds being out of range, so we don't
        // need to check those.
        // The seconds could include decimals, however for this purpose we are ignoring them.
        if ($hours > 23 || $hours < 0) {
            throw new InvalidArgumentException('Hours must be between 0 and 23');
        }

        return new self($hours, $minutes, $seconds);
    }

    public function toDateTime(DateTimeInterface $dateTime = null) : DateTimeInterface
    {
        $dateTime ??= new DateTimeImmutable();

        return $dateTime->setTime($this->hours, $this->minutes, $this->seconds);
    }
}

用法：

var_dump(MySqlTime::fromMySqlTimeAsDurationInDay('12:34:56')->toDateTime());

輸出：

object(DateTimeImmutable)#3 (3) {
  ["date"]=>
  string(26) "2023-07-31 12:34:56.000000"
  ["timezone_type"]=>
  int(3)
  ["timezone"]=>
  string(16) "Europe/Amsterdam"
}

Demo: https://3v4l.org/B6mr4#v8.2.7