<?php
/**
 * Demonstration of Processor))
 */
class SomeClass
{
    /** @type string[] */
    private $allowedParam2Values = ['first', 'second', 'third'];

    /**
     * Some first processor
     *
     * @type int           $id
     * @type string        $param2
     * @type SomeInterface $param3
     */
    public function someProcessor1($id, $param2, SomeInterface $param3)
    {
        if (!is_int($id)) {
            throw new \InvalidArgumentException('Param id must be int');
        }

        if ($id < 0) {
            throw new \InvalidArgumentException('Param id must be more than 0');
        }

        if (!is_string($param2)) {
            throw new \InvalidArgumentException('Param param2 must be int');
        }

        if (!in_array($param2, $this->allowedParam2Values)) {
            throw new \InvalidArgumentException('Param param2 out of range');
        }

        // Some business logic here
    }
}