php determines whether there is login

php determines whether the user is logged in

The following example uses Session to determine whether the user is logged in:

functions.php

 
        
 
            Username:
 
             
        
 
        
 
            Password:
 
             
        
 
        
 
             
        
 
        '; 
    }else{  // 登录显示欢迎页面
        echo 'Welcome, '.$_SESSION['username']; 
    } 
} 
?>

index.php

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