I have the PHP code:
$query = mysqli_query($mysqli, "SELECT * FROM `table_1`");
$result = mysqli_num_rows($query);
$queryTwo = mysqli_query($mysqli, "SELECT * FROM `table_2`");
$resultTwo = mysqli_num_rows($queryTwo);
$number = $result + $resultTwo;
return $number;
The point is that sometimes, the $number
variable is returning NULL,
when it should not supposed to do that.
I have always rows in those 2 tables, and the returned result should not be NULL, ever.
Is this a correct approach to sum the number of rows from 2 tables? I don`t understand why sometimes I get NULL instead of a number.