Selecting float number from FLOAT() column with PHP and mysqli

Good day. I have a problem with selecting float number from MySQL database using bind variables of mysqli class.

The type of price column is FLOAT(9,2) and it's value 1.01

Simplified piece of code:

$stmt = $dbh->prepare('SELECT price FROM goods WHERE id=5');
$stmt->execute();
$stmt->bind_result(&$price);
$stmt->fetch();开发者_JS百科
echo $price;
// 1.0099999904633

As I understood mysqli automatically casts it to double. But why?

When I change type of column in table to DOUBLE(9,2) everything goes fine and the $price value is exactly 1.01.

Is there any way to obtain 1.01 value in $price variable having FLOAT(9,2) as column type (without rounding functions)?

Thank you.

As noted above:

1.01 cannot be represented as a floating point number exactly. As you see, the nearest you can come is 1.0099999.... If you're storing money values in the database, don't use floats. Use a DECIMAL type, or an int and convert your dollar/cents values to just cents