username_check()
public function username_check(string $str): string|bool
Description
Checks the availability of a username and validates it against existing usernames in the 'trongate_administrators' table.
This method is designed to be invoked as a form validation callback.
Parameters
| Parameter |
Type |
Description |
Default |
Required |
| $str |
string |
The username to be checked. |
N/A |
Required |
Return Value
| Type |
Description |
| string|bool |
Returns an error message (string) if the username is not available, otherwise returns TRUE (bool). |
Example Usage
$submit = post('submit');
if ($submit == 'Submit') {
// Set validation rules for username, password, and repeat password.
$this->validation->set_rules('username', 'username', 'required|min_length[5]|callback_username_check');
$this->validation->set_rules('password', 'password', 'required|min_length[5]');
$this->validation->set_rules('repeat_password', 'repeat password', 'matches[password]');
$result = $this->validation->run();
if ($result == true) {
// Form validation success.
echo 'Success!';
} else {
// Form validation error(s);
echo validation_errors('<div class="error-message">', '</div>');
}
}