Fetching data from mySql database for php user session - php

Question

I'm relatively new to PHP and mySQL, and I'm trying to create user sessions with fields from a mySQL database.
The way I've set it up means that I am getting a session with the two fields entered into the login form (username and password) by checking these against the database, but I cannot retrieve any other data from the database and add it to the session.
How can I retrieve other data from the database and add this to the new session?
<?php
require('db.php');
session_start();
// If form submitted, insert values into the database.
if (isset($_POST['username'])){
// removes backslashes
$username = stripslashes($_REQUEST['username']);
//escapes special characters in a string
$username = mysqli_real_escape_string($con,$username);
$password = stripslashes($_REQUEST['password']);
$password = mysqli_real_escape_string($con,$password);
//Checking is user existing in the database or not
$query = "SELECT * FROM `users` WHERE username='$username' and password='".md5($password)."'";
$result = mysqli_query($con,$query) or die(mysql_error());
$rows = mysqli_num_rows($result);
if($rows==1){
//This one works
$_SESSION['username'] = $username;
//This one doesn't
$_SESSION['email'] = $rows ['email'];
// Redirect user to index.php
header("Location: index.php");
}else{
echo "<div class='form'>
<p>Username/password is incorrect.</p>
<br/>Click here to <a href='login.php'>Login</a></div>";
}
}else{
}
?>

Answer 1

$rows is counter variable (having count of number of records) there that's why not working.
Do like below:-
....previous code as it is
$result = mysqli_query($con,$query) or die(mysql_error());
$row = mysqli_fetch_assoc($result); //fetch record
$rows = mysqli_num_rows($result);
if($rows==1){
$_SESSION['email'] = $row['email'];
header("Location: index.php");
}...rest code as it is
Note:-
1.Don't use md5 password encryption, use password hashing technique.
2.Use prepared statements of mysqli_* to prevent your code from SQL Injection