php code allways runs else and not if - php

Question

I Cant login for some reazon, every time i open with
the testing file password exist, i have put an echo-test and mark it, but the code allways runs the else and not the if.
the kernel-login-logout.php is this:
<?php
$formusername = $_GET["username"];
$formpasswd = $_GET["passwd"];
$passwdget = file_get_contents( "users/$formusername/passwd/thepasswd.txt" );
if ($formpasswd == $passwdget)
{
setcookie("libusername", $formusername,time() + (86400 * 7));
setcookie("libpasswd", $formpasswd,time() + (86400 * 7));
}
else
{
echo ("Password not found<br>");
}
?>
<?php echo ($passwdget); ?><br>
<?php echo ($formpasswd); ?>
the url:
kernel-login-logout.php?username=userdokimi&passwd=testpasswd&login=Login
the output:
Password not found
testpasswd
testpasswd

Answer 1

You have code like this:
if A
if B
else C
That else applies to the if B, NOT the if A.
I think you meant this:
if A
elseif B
else C

Answer 2

Try this:
<?php echo "'$passwdget'",strlen($passwdget); ?><br>
<?php echo "'$formpasswd'",strlen($formpasswd); ?>
to confirm that one or both of those variables don't have some invisible characters glued on to them, making them not equal.
You have a password stored in plain text (and visible in a Query String) -- that's very insecure, but we'll let that pass for the moment.

Answer 3

Don't assume the keys "logout", "passwd" and "username" will always be set.
You are also missing an else there.
if (isset($_GET['passwd']) && $_GET["passwd"] == $passwdget)
{
setcookie("libusername", $username,time() + (86400 * 7));
setcookie("libpasswd", $passwd,time() + (86400 * 7));
}
else if (isset($_GET['logout']) && $_GET["logout"] == "Logout")
{
setcookie("libusername", null,time() + (86400 * 7));
setcookie("libpasswd", null,time() + (86400 * 7));
}
else
{
echo ("<br>Password not found");
}