MongoDB\BSON\Document::has
(mongodb >=1.16.0)
MongoDB\BSON\Document::has — Returns whether a key is present in the document
说明
final public MongoDB\BSON\Document::has(
string $key
):
bool
参数
key
(string)
-
The key to look for in the document.
返回值
Returns true
if the key is present in the document and false
otherwise.