# Processing Null In The `Result Set`
__*NULL in result sets*__
+ Connector converts SQL **NULL** to the corresponding instance specific of the language platform
+ Using the built-in **`===`** operator or **`is_null()`**:
  + **`if ($row[$key] === NULL)`**
  + **`if (is_null($row[$key]))`** 

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The PHP API rely on comparing the returned value to equivalent values in the language `(NULL)` using built-in comparison operators.