Throttling attempts not being recorded into database - php

Question

Hi I am trying to create login throttling with object oriented php, I have successfully created it with structured code but I can not get it to work with object oriented so far heres the code:
public function find_failed_login($email = null) {
if(!empty($email)) {
$query = "SELECT * FROM {$this->table} WHERE email = '".$this->db->escape($email)."'";
return $this->db->query($query);
}
}
public function record_failed_login($email) {
$count = 1;
$time = time();
$failed_login = $this->find_failed_login($email);
if(!$failed_login) {
$query = "INSERT INTO {$this->table} (email, count, last_time) VALUES ('".$this->db->escape($email)."', {$count}, {$time})";
return $this->db->query($query);
} else {
$query = "UPDATE {$this->table} SET email = '{$email}', count = count + 1, last_time = {$time}";
return $this->db->query($query);
}
}
public function clear_failed_logins($email = null) {
if(!empty($email)) {
$failed_login = $this->find_failed_login($email);
if(isset($failed_login)) {
$query = "DELETE FROM {$this->table} WHERE email = '".$this->db->escape($email)."'";
return $this->db->query($query);
}
}
}
public function throttle_failed_logins($email = null) {
if(!empty($email)) {
$throttle_at = 3;
$delay_in_minutes = 1;
$delay = 60 * $delay_in_minutes;
$failed_login = $this->find_failed_login($email);
if(isset($failed_login)) {
while($failed = mysqli_fetch_assoc($failed_login)) {
if(isset($failed) && $failed['count'] >= $throttle_at) {
$remaining_delay = ($failed['last_time'] + $delay) - time();
$remaining_delay_in_minutes = ceil($remaining_delay / 60);
return $remaining_delay_in_minutes;
} else {
return 0;
}
}
}
}
}
and in the login page I am calling it like this:
$objLogin = new Login();
if($objForm->isPost('login_email')) {
$throttle_delay = $objLogin->throttle_failed_logins($objForm->getPost('login_email'));
if($throttle_delay > 0) {
$objValid->add2Errors('failed_logins');
}
when I try this I get no error or anything for that matter, its like it is dead code, would appreciate some professional help :)