In my login system userid is auto increment when anyone registers. I want to echo the userid of the logged in session. Searching through other answers suggests adding
$_SESSION['userid'] = $userid
in the login part of the session. echo $userid says undefined variable. Any fix?
<?php
if(isset($_POST['login']))
{
@$username=$_POST['username'];
@$password=$_POST['password'];
$query = "SELECT * from users where username='$username' and password='$password' ";
//echo $query;
$query_run = mysqli_query($con,$query);
//echo mysql_num_rows($query_run);
if($query_run)
{
if(mysqli_num_rows($query_run)>0)
{
$row = mysqli_fetch_array($query_run,MYSQLI_ASSOC);
$_SESSION['username'] = $username;
$_SESSION['password'] = $password;
$_SESSION['userid'] = $userid;
header( "Location: profile.php");
}
else
{
echo '<script type="text/javascript">alert("No such User exists or username and password do not match. Invalid Credentials")</script>';
}
}
else
{
echo '<script type="text/javascript">alert("Database Error")</script>';
}
}
else
{
}
?>
