INSERT - Number of bind variables doesn't match number of fields in prepared statement
You are attempting to bind_result on a statement that is not returning any results.
Remove this line.
$stmt -> bind_result($user, $pw);
INSERT - Number of bind variables doesn't match number of fields in prepared statement
You are attempting to bind_result on a statement that is not returning any results.
Remove this line.
$stmt -> bind_result($user, $pw);