php - foreach invalid argument and undefined variable

I am trying to create a form and i get an error in these lines.

 else 
 {
  //report the errors.

 echo '
 Err... 
 
 The following error(s) have occured
';

 foreach ($errors as $msg)
     {

   echo "--$msg
\n";
  }
  echo '
Please Try Again.

';

 }

So, what's wrong?? Here's the error message -

Err...

The following error(s) have occured -

Notice: Undefined variable: errors in
C:\wamp\www\password.php on line 107

Warning: Invalid argument supplied for
foreach() in C:\wamp\www\password.php
on line 107 Please Try Again.

I have set errors as an array.

My code above --

if(isset($_POST['submitted']))
{

require_once('C:\wamp\www\connect.php');

//connecting to db

$errors = array();

if (empty($_POST['email']))

{
    $errors[]='Please enter a valid email address.';
}

Here is my complete code -

//forgot password update

include('C:\wamp\www\header.html');

//check if form has been submitted
require_once('C:\wamp\www\connect.php');
    //connecting to db




if(isset($_POST['submitted'])) {
    $errors = array();


    if (empty($_POST['email']))

    {

        $errors[]='Please enter a valid email address.';
    }

    else
    {
      $e = mysqli_real_escape_string($db_name,trim($_POST['email']));
    }

    //check for current password
    if (empty($_POST['password']))


    {
        $errors[]='Current password does not match.';
    }

    else
    {
      $p = mysqli_real_escape_string($db_name,trim($_POST['password']));
    }


    //check for a new password and match with confirm pass.

    if(!empty($_POST['password1']))
    {
        if($_POST['password1'] != $_POST['cpass'])
        {
            $errors[] = 'The entered password and confirm password do not match.';
        }
        else
        {

            $np=mysqli_real_escape_string($db_name,trim($_POST['password1']));
        }
    }
    if(empty($errors))
    //if everything is fine.

    //verify the entered email address and password.

    $q="SELECT username FROM users WHERE (email='$e' AND password=SHA1('$p'))";
    $r=@mysqli_query($db_name,$q);

    $num = @mysqli_num_rows($r);
    if($num==1)
    //if it matches.

    //get user id
    {
    $row=mysqli_fetch_array($r, MYSQLI_NUM);

    //udpdate query.


    $q="UPDATE users SET password= SHA1('$np') WHERE username=$row[0]";

    $r=@mysqli_query($db_name, $q);

    if (mysqli_affected_rows($db_name) ==1)

    {
        echo '
Your password has been updated.
';
    }


    else {
        echo '
Whops! Your password cannot be changed due a system error. Try again later. Sorry
';

    echo '
' .mysqli_error($db_name). 'Query:' . $q.'
';
    }


    exit();
    }
    else 

    {

        //invalid email and password

        echo 'The email address and password do not match';
    }

}
    else 
    {

        //report the errors.

    echo '
 Err... 
    
 The following error(s) have occured
';

    foreach ($errors as $msg)
        {
            echo "--$msg
\n";
        }
        echo '
Please Try Again.

';


    }


    ?>