Header ("Location: index. php") page jump

The header (& quot; Location: index. php & quot;) page jumps to the question for beginners !!! Urgent! If ($ password = $ row [& quot; password & quot;]) & nbsp; {& nbsp; $ _ SESSION header ("Location: index. php ") page jump
Newbie for advice !!! Urgent!
If ($ password = $ row ["password"])
{
$ _ SESSION ["admin"] = 1;
$ _ SESSION ["username"] = $ username;
Header ("Location: index. php ");
Exit;
}
After executing this code, the page is converted to a blank page, but accessing this page from the link again is a logon interface (that is, it has been transferred to index. php). why is this ???

------ Solution --------------------
The browser must be closed and the session will be updated only after it is re-opened. In the tab, the session is not actually destroyed.

Add an exit page:

PHP code

// Logout. phpsession_start (); session_destroy (); header ("Location: index. php ");
------ Solution --------------------
Nothing on the index interface? You 'd better separate the form page from the processing page.