MongoDB\BSON\Document::offsetGet
(mongodb >=1.17.0)
MongoDB\BSON\Document::offsetGet — Returns the value of a key in the document
参数
key-
The key to retrieve from the document.
返回值
Returns the value associated with the given key. If the key is not present in the document, an exception is thrown.
注意: When encountering a value encoded as 64-bit integer in the BSON document, the return value of this method will be a MongoDB\BSON\Int64 instance.
错误／异常
- Throws MongoDB\Driver\Exception\InvalidArgumentException on argument parsing errors.
- Throws MongoDB\Driver\Exception\RuntimeException if the key is not present in the document.
参见
- ArrayAccess::offsetGet() - 获取一个偏移位置的值
- MongoDB\BSON\Document::get() - Returns the value of a key in the document
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