PHP displaying error code once - php

Question

When a user clicks login, "Wrong Email Or Password" Is displayed for each user that is in Database Array. Could someone point me in the right direction to Only Display Error code once if user input wrong email/password?
I'm Using Flintstone to store Users.
if (isset($_POST['login'])) {
$TempEmail = strtolower($_POST['email']);
$TempPass = $_POST['password'];
// Get Keys From DB;
$keys = $users->getKeys();
// Check If DB is Empty
if (!empty($keys)) {
foreach ($keys as $key) {
$user = $users->get($key);
$email = strtolower($user['Email']);
$password = $user['Password'];
$hash = password_verify($TempPass, $password);
try {
if (($TempEmail === $email) && ($hash === true))
{
$_SESSION['use']=$email;
// On Successful Login redirects to home page
header("Location:/home/");
}
else
{
echo "Wrong Email Or Password";
//break;
}
} catch (Exception $e) {
return $e->getMessage();
}
}
} else {
echo "DB Is Empty";
exit;
}
}

Answer 1

Simply move echo "Wrong Email Or Password" right after the foreach-loop instead of inside it. If the email is found and the password matches, the user will still be redirected before the code reaches that point.
foreach ($keys as $key) {
// Your current code, minus the echo.
}
// This is after the foreach and will only be executed if there were
// no match for the email and password.
echo "Wrong Email Or Password";
Just remember to add an exit; after your header('Location:....'); to stop PHP from executing anything more.

Answer 2

The foreach loop goes through all the $keys, hence it echoes "Wrong Email Or Password" for every wrong key.
Save the outcome of a successfull query in a variable i.e. $success = false. If the correct login was found, set it to true. After the foreach loop you can write
if(!$success){echo "Wrong password"};

Answer 3

I think this is more user-friendly:
$login = false;
foreach ($keys as $key) {
$user = $users->get($key);
$email = strtolower($user['Email']);
$password = $user['Password'];
$hash = password_verify($TempPass, $password);
try {
if ($TempEmail === $email) {
if ($hash === true) {
$login = true;
$_SESSION['use'] = $email;
// On Successful Login redirects to home page
header("Location:/home/");
} else {
break;
}
}
} catch (Exception $e) {
return $e->getMessage();
}
}
if (!$login) {
echo "Wrong Email Or Password";
}