src/lib/models/fields.php

<?php
class fields extends \Phalcon\Mvc\Model
{
    public $id;
    public $name;
    public $type;
    public $field_value;
    public $comments;
    public $weight;
    public $class_name;
    public $required;
    public function initialize()
    {
    }
    function isActive($array)
    {
        $array = explode(',' , $array);
        if(in_array($this->id, $array)){
            return true;
        } else{
            return false;
        }
    }
}