extended Form Validation/setting custom error messages and errors

[eluser]LAMP Coder[/eluser]
Modified methods: set_rules, error_string

Why?
I wanted to be able to set custom errors by every field on the run instead of using the field name.

Usage:

$this->form_validation->set_rules('field_name', 'readable name', 'required', 'This field is require, no matter what!!');

Added methods: set_error, custom_errors

Why?

Sometimes, I had to run some validations based on more then one fields.

I.e. in case if "state" was required in case if user selects "United States" or in something else that i couldn't push through the form validation class.. such as.. if i check the login and login comes out to be incorrect. I should be able to set an error message "Invalid username/password" I know it's not a form validation error... but i wanted i wanted form validation to handle displaying errors,

$this->form_validation->set_error('Yada Yada Yada!!');

if you're using set_error, you'll have to do following:

Code:

if($this->Form_validation->custom_errors() == FALSE && $this->Form_validation->run() == FALSE)
{
      //no errors, let's do something here
}

instead of:

Code:

if($this->Form_validation->run() == FALSE)
{
      //no errors, let's do something here
}

and last but not the least, you can use following to display the errors

Code:

<?php echo validation_errors(); ?>