MongoDB\BSON\Document::offsetExists
(mongodb >=1.17.0)
MongoDB\BSON\Document::offsetExists — Returns whether a key is present in the document
说明
final public MongoDB\BSON\Document::offsetExists(
mixed $key):
bool
参数
key-
The key to look for in the document.
返回值
Returns true if the key is present in the document and false otherwise.
