dynamic input fields validation in codeigniter

Wouter60's answer is the best solution offered so far. Another alternative would be to do something like this:

PHP Code:

$x = 1;
do {
    if ($this->input->post("ID{$x}_first_name") || $this->input->post("ID{$x}_last_name") /* check all of your fields */) {
        $this->form_validation->set_rules("ID{$x}_first_name", 'First Name', 'trim|required|max_length[50]');
        $this->form_validation->set_rules("ID{$x}_last_name", 'Last Name', 'trim|required|max_length[50]');
        // etc.
    } else {
        break; // you could set $x = 0; instead, but by using break, $x is set to 1 more than the number on the last set of fields you validated.
    }
} while (++$x > 0); 


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