php sessions to authenticate user on login form

Question

I have the following code designed to begin a session and store username/password data, and if nothing is submitted, or no session data stored, redirect to a fail page.

Answer 1

Here are a few other things, which may or may not help you, by the way :

• Do you have error_reporting on ? (see also)
• Do you have display_errors on ?
• Is session_start the first thing you are doing in your page ? There must be nothing output before
• Are the cookies created on the client-side ?
• header Location indicates the browser it has to go to another page ; it doesn't stop the execution of the PHP script. You might want to (almost always anyway) add "exit" after it.