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PHP to determine whether the user session is related to the problem, put before <html> does not work

Source: Internet
Author: User
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PHP Determines if there is a problem with the user session, and does not work before 
]
 
  require_once (' config.php ');

Determine user permissions
if ($_session[' member '! = "admin") {
echo "";
}
?>


It doesn't work before, put it inside, Firefox makes a judgment, but IE still doesn't work php?session? Firefox PHP session

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------Solution--------------------
Add a session_start () to the top of the page;
------Solution--------------------
Session and Cookie are brothers.

Session_Start () is to initialize the session information (in a certain probability to delete the existence of the server session file, the probability can be set in php.ini).

There is no need to session_start () can also access session information: is because your cookie is still there. Then the session file on the server is still there. So you can read it.

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