ACC SHELL

<?php

class Counter
{

    private static $counter;

    /**
     * Set counter to initial value. If initial value is not set, default is zero
     */
    public static function init($initValue = false)
    {
	self::$counter = intval($initValue);
    }

    /**
     * @return Actual value of the counter
     */
    public static function getCounter()
    {
	return self::$counter;
    }

    /**
     * Set counter + 1
     */
    public static function increment()
    {
	self::$counter++;
    }

    /**
     * Set counter - 1
     */
    public static function decrement()
    {
	self::$counter--;
    }

    /**
     * Check if counter is even
     * @return boolen
     */
    public static function isEven()
    {
	return self::$counter % 2 == 0 ? true : false;
    }

    /**
     * Check if counter is odd
     * @return boolen
     */
    public static function isOdd()
    {
	return self::$counter % 2 != 0 ? true : false;
    }

}