am Webserver (PHP) anmelden

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PHP so sieht der Code aus...

Code:

if (isset($_SESSION['userSession'])!="") { 
   header("Location: home.php");
   exit;

Code:

if (isset($_POST['btn-login'])) {

Code:

 if (password_verify($password, $row['password']) && $count==1) {  
                         $_SESSION['userSession'] = $row['user_id'];      
                         header("Location: home.php");
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