<?php

class melliCode
{
    /**
     * Hold National Code
     *
     * @access Protected
     * @var Integer
     */
    protected static $nationalCode = int;

    /**
     * Incorrect List
     *
     * @access Protected
     * @var Integer
     */
    protected static $notNationalCode = array(
                                            "1111111111",
                                            "2222222222",
                                            "3333333333",
                                            "4444444444",
                                            "5555555555",
                                            "6666666666",
                                            "7777777777",
                                            "8888888888",
                                            "9999999999",
                                            "0000000000");

    /**
     * Construct
     *
     * @access Public
     * @var Empty
     */
    public function __construct()
    {

    }

    /**
     * National Validation Code
     *
     * @access Public
     * @var Integer
     */
    public function nationalCode($code)
    {
        self::$nationalCode = trim($code);

        if(self::validCode())
        {
            $melliCode = self::$nationalCode;

            $subMid = self::subMidNumbers($melliCode, 10, 1);

            $getNum = 0;

            for($i = 1; $i < 10; $i++)
                $getNum += (self::subMidNumbers($melliCode, $i, 1) * (11 - $i));

            $modulus = ($getNum % 11);

            if((($modulus < 2) && ($subMid == $modulus)) || (($modulus >= 2) && ($subMid == (11 - $modulus))))
                return true;
        }

        return false;
    }

    /**
     * Validate
     *
     * @access Protected
     * @var Boolean
     */
    protected function validCode()
    {
        $melliCode = self::$nationalCode;

        if((is_numeric($melliCode)) && (strlen($melliCode) == 10) && (strspn($melliCode, $melliCode[0]) != strlen($melliCode)))
            return true;

        return false;
    }

    /**
     * Get Portion of String Specified
     *
     * @access Protected
     * @var Integer
     */
    protected function subMidNumbers($number, $start, $length)
    {
        $number = substr($number, ($start - 1), $length);

        return $number;
    }
}

?>