// THIS HELPER METHOD CHECKS IF THE EMAIL IS VALID OR NOT. IT BASICALLY CHECKES THE DUPLICATION
function email_duplication($email = "", $user_id = "")	{	$CI	= &get_instance();	$CI->load->database();	if (filter_var($email, FILTER_VALIDATE_EMAIL)) { //FILTER MAIL FIRST	$query = $CI->db->get_where('users', ['email' => $email]);	if (!empty($user_id)) { //IF USER-ID EXIST	$query_result = $query->row_array();	if ($query->num_rows() == 0 || $query_result['id'] == $user_id) { //IF NOT FIND ANY DUBLICATE	return true;	} else { //IF FIND	$CI->session->set_flashdata('notice_message', get_phrase('Email_already_exists'));	redirect($_SERVER['HTTP_REFERER'], 'refresh');	}	} else { //WHEN USER ID NOT EXIST	if ($query->num_rows() > 0) { //FIND DUBLICATE	$CI->session->set_flashdata('notice_message', get_phrase('Email_already_exists'));	redirect($_SERVER['HTTP_REFERER'], 'refresh');	} else { //NOT FIND	return true;	}	}	} else { //INVALID EMAIL	$CI->session->set_flashdata('error_message', get_phrase('Invalid_email'));	redirect($_SERVER['HTTP_REFERER'], 'refresh');	}	}