3. Read user-file

Step 1: Creating a user.txt

1. Create a file:

• Create a file called user.txt and put it in the folder where all your other files are.

  stefan,mypass,standarduser
  bao,bao,admin
  Janek,password456,admin
  Noel,noel,superdude

2. Read data from a file:

• So now we have a file with users but we need to read the file to an array so we can check if your user data actually is correct.

  $users = [];   // Create an array
  $file =fopen('users.txt', 'r');   // Open the fie
  while(!feof($file)){  // Reading until eof (End of file)
   array_push($users,fgetcsv($file));  // Reading one row at a time and store it into the user.   
  }
  fclose($file);  // Close the file
  );

3. Check the login

• So now we have the userlist in an array we can now check the set value of $_POST['usernamne'] and POST['password'] and see if the credentials are correct.

  
  // Check if you are trying to loggin
  if(isset($_POST['loginname']) && isset($_POST['password'])){
  $username = $_POST['loginname'];
  $password = $_POST['password'];
  // Check if the input data actually is a user or not
  $loggedin=false;
  foreach($users as $user){
     if($user[0] === $username && $user[1] === $password){
         $loggedin=true;
         $_SESSION['loggedin'] = true;
         $_SESSION['role'] = $user[2];
         $_SESSION['username'] = $username;
     }
  } 
  if(!$loggedin){
         header('Location: hell.html');
     exit;
  }
  }