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