Validate characters in Codeigniter - php

Question

I am developing an application in CI supported Grocery CRUD , but at the time of validation is not recognized , what I need is that a field is validated to accept only alphabetic characters , plus points , comma and space but does not work:
Function in controller
Lines of code in the function of Grocery CRUD in what I call the function solo_letras:
Lines of code in method of Grocery CRUD
What would be a validation that could take?

Answer 1

Use the built in form validation in CodeIgniter.
I do it like this.
At the beginning of your function set all the rules for your form inputs like this:
$this->form_validation->set_rules('inputFirstName', 'First Name', required|min_length[4]|max_length[16]|is_unique[users.username]');
This is a sample for a user name field. The first parameter is the form input name='inputFirstName', The second is a readable version of the first and is used for error reporting, then comes your validations which are separated by the pipe character. There is a validation for matching regex; regex_match[/regex/].
Place all your validations then use:
if($this->form_validation->run() == false) {
Do something here if validation fails
return false;
}
To test for validation.
Then continue on with the code if validation passes.
Here is a full sample of a simple registration function:
public function register()
{
$this->output->set_content_type('application_json');
$this->form_validation->set_rules('inputUsername', 'User Name', 'required|min_length[4]|max_length[16]|is_unique[users.username]');
$this->form_validation->set_rules('inputEmail', 'Email', 'required|valid_email|is_unique[users.email]');
$this->form_validation->set_rules('inputFirstname', 'First Name', 'required|max_length[20]');
$this->form_validation->set_rules('inputLastname', 'Last Name', 'required|max_length[20]');
$this->form_validation->set_rules('inputPassword', 'Password', 'required|min_length[6]|max_length[16]|matches[inputPasswordConfirm]');
$this->form_validation->set_rules('inputPasswordConfirm', 'Password Confirmation', 'required');
if($this->form_validation->run() == false) {
$this->output->set_output(json_encode(['result' => 0, 'error' => $this->form_validation->error_array()]));
return false;
}
$username = $this->input->post('inputUsername');
$email = $this->input->post('inputEmail');
$firstName = $this->input->post('inputFirstname');
$lastName = $this->input->post('inputLastname');
$password = $this->input->post('inputPassword');
$passwordConfirm = $this->input->post('inputPasswordConfirm');
$this->load->model('user_model');
$user_id = $this->user_model->insert([
'username' => $username,
'email' => $email,
'firstName' => $firstName,
'lastName' => $lastName,
'password' => hash('sha256', $password . PASSWORD_SALT)
]);
if($user_id) {
$this->session->set_userdata(['user_id' => $user_id]);
$this->output->set_output(json_encode(['result' => 1]));
return false;
}
$this->output->set_output(json_encode(['result' => 0, 'error' => "User not created."]));
}