valid_email | Active Model Validations for Email using mail gem | Validation library

i am trying to validate email address using JQuery but it always return true even for invalid email address. this is the function.

I am using CodeIgniter 4 on Windows 10 and I'm having an issue where CI is not recognizing my model.

I am receiving the following error upon form submission:

Error
Class 'CodeIgniter\Models\UserModel' not found
APPPATH\Controllers\User.php at line 42

CI is displaying this line (in User.php) as the source of the issue:

$model = new UserModel();

Here is my User controller file (app/Controllers/User.php):

How to validate optional values in codeigniter 4

for example conditions

1. If one field is filled by user which is an optional
2. If one field is left empty by user which is an optional

how should I validate in first condition

This is my model code where I want phone field to be optional

I cannot seem to upload files in codeigniter. I don't know if the issue lies with the if ($_FILES['avatar']['name'] == "").

My controller

I am working on a basic blog application in Codeigniter 3.1.8 and Bootstrap 4.

I have added a registration and login system to this application. I am current working on a password reset system.

I was able to do these 2 things separately:

1. Send a password reset email containing dummy text.
2. Create a valid password reset link.

I was unable however, to send the email once the reset link was inserted into the email body.

Here is he controller:

I am working on an online newspaper/blogging application with CodeIgniter 3.1.8 and Twig.

I have added a contact form to the application:

I am working on a basic blog application in Codeigniter 3.1.8 and Bootstrap 4.

I have added a registration and login system to this application.

I have run into this issue while developing a password reset functionality: the email congaing he reset link is not send (or maybe not received).

The password reset form takes the email address used at registration:

I have some issue with my validation error message for Codeigniter 4, the validation is working but the error messages are not showing, I don't know what went wrong. Below are my code :

Controller

I am using codeigniter framework for my site, but in form_validation I am getting error I followed this link in stackoverflow but it didn't work for me followed link: idn_to_ascii() in 5.2.17

Issue:

code in codeigniter libraries/form_validation.php: