Php simple login script white page

Question

Hello im trying to implant PDO into my login script to make it safrer from sql injection. But im getting a white page i think its because im trying to count the rows to see if

Answer 1

There's couple of things in your code that sticks in the eyeball.

If you pasted the whole script here, you're missing session_start(). I don't know what's in your home.php, but if it's content generation depends on a value in $_SESSION['username'], it's never going to happen because it will be empty after the header redirection.

Take a look at the manual about session_start().

Also, as stated:

For most databases, PDOStatement::rowCount() does not return the number of rows affected by a SELECT statement.

Just in case thought to mention this. I've spent some good amount of time in the past wondering this thing myself.

You might want to take a glance at example #2 on the manual about rowCount.

And of course, as @Paul already pointed, you shouldn't be using mysql_query() anymore if migrating to PDO.