Returns the DateTimeImmutable representation of this UTCDateTime

# MongoDB\BSON\UTCDateTime::toDateTimeImmutable

(mongodb >=1.20.0)

MongoDB\BSON\UTCDateTime::toDateTimeImmutable — Returns the DateTimeImmutable representation of this UTCDateTime

### 说明

final public function MongoDB\BSON\UTCDateTime::toDateTimeImmutable(): DateTimeImmutable

### 参数

此函数没有参数。

### 返回值

Returns the DateTimeImmutable representation of this UTCDateTime. The returned DateTimeImmutable will use the UTC time zone.

### 错误／异常

- Throws MongoDB\Driver\Exception\InvalidArgumentException on argument parsing errors.

### 示例

示例 #1 MongoDB\BSON\UTCDatetime::toDateTimeImmutable() example

    <?php

    $utcdatetime = new MongoDB\BSON\UTCDateTime(1416445411987);
    $datetime = $utcdatetime->toDateTimeImmutable();
    var_dump($datetime->format('r'));
    var_dump($datetime->format('U.u'));
    var_dump($datetime->getTimezone());

    ?>

以上示例的输出类似于：

    string(31) "Thu, 20 Nov 2014 01:03:31 +0000"
    string(17) "1416445411.987000"
    object(DateTimeZone)#3 (2) {
      ["timezone_type"]=>
      int(1)
      ["timezone"]=>
      string(6) "+00:00"
    }

### 参见

- MongoDB\BSON\UTCDateTime::toDateTime() - Returns the DateTime representation of this UTCDateTime
- » BSON Types: Date

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