(PHP 3>= 3.0.4, PHP 4 >= 4.0.0)
OCIColumnIsNULL -- test whether a result column is 
NULLDescription
int OCIColumnIsNULL (int stmt, mixed column)
     OCIColumnIsNULL() returns TRUE if the returned
     column column in the result from the
     statement stmt is NULL. You can either use
	 the column-number (1-Based) or the column-name for the
	 col parameter.