似乎无法使PHP登录名变为“ stick”

Question

<?php
//Login Module (Updated, isset now correct)
session_start();
if(!(isset($_SESSION['login']) && ($_SESSION['login'] != ""))) {
    include('processor/ProcessLogout.php');
} else {
    include('processor/ProcessLog.php');
}
?>

Problem is...it doesn't work. I can't seem to get it to validate to true T_T. I set $_SESSION['login'] in processor/assess_login.php. ProcessLog is merely a container for some divs and a form the form passes information to asssess_login (which then tells me whether a login has been successful or not). One displays a login form the other displays a logout form. Unfortunately, even though I get "Login Successful"... it's rather worrying that $_SESSION['login'] refuses to change to '1'. (That's what I do in assess_login if the login is successful. if it fails I set it to an empty string.

Now as far as I'm aware session_start() is supposed to remember this, but for some reason...it doesn't oo; So any tips on my bug hunting

There are compilation errors and taking away the ! does infact display the alternative, so I know that bit 'is' working it just isn't evaluating to true.

Now... as for the assess_login...

           if ($db_found) {
        $member_username = quote_smart($member_username, $db_handle);
        $member_password = quote_smart($member_password, $db_handle);

        $sql = "SELECT * FROM $tblname WHERE username=$member_username AND passphrase=$member_password";
        $result = mysql_query($sql);
        $num_rows = mysql_num_rows($result);

        //Validate there is a user
        if($result) {
            if($num_rows == 1) {
                session_start();
                $_SESSION['login'] = '1';
                header("location: ../login_success.php");

            } else {
                session_start();
                $_SESSION['login'] = "";
                header("location: ../login_fail.php");

            }
        } else {
            $error_msg = "Error Validating User! -1";
        }           
    mysql_close($db_handle);
    }

Bearing in mind it is buried somewhat. As I've said before I can't get the login to stick and I know I'm missing something obvious I'll be damned if I can figure out what though.

Answer 1

Your if statement is not correct:

if(!(isset($_SESSION['login'])) && ($_SESSION['login'] != ""))

should be

if(!(isset($_SESSION['login']) && $_SESSION['login'] != ""))

Answer 2

if(!(isset($_SESSION['login']) && $_SESSION['login'] != ""))

在这段代码中，您说的是：如果未设置并且不为空，则希望将其设置为不为空：

if((isset($_SESSION['login'])) && ($_SESSION['login'] != ""))