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