Value in array CodeIgniter validation rule

Question

CodeIgniter has many validation rules but is there any rule for checking if the value from a certain field is present in an array(given as parameter to the validation rule)?

For example:

$possible_values = array('beer', 'soda', 'wine', 'water');

$this->form_validation->set_rules('drink', 'Drink', 'required|trim|found_in_array[possible_values]');

Answer 1

you can use callback_function_name like so,

$this->form_validation->set_rules('drink', 'Drink',  'callback_customInArray');


public function customInArray($str)
    {
        $possible_values = array('beer', 'soda', 'wine', 'water');
        if(in_array($str, $possible_values){return true;}
        return false;
    }

read more about that in CI Form Validation