A question mark in the URL that a header function uses

[jbengia1]

Action="" or action="?", how do they really differ?

If your page is index.php?action=dostuff and form method = POST: action="" will call index.php?action=dostuff and send POST data. action="?" will call index.php? and send POST data. “?” essentially truncates any url parameters when the form is submitted.

Thank you for comparing ? and “”. On page 127, it says that header('Location: .'); will also point to index.php. Would you please compare . with those two (? and “”)?