KrakenApiCache.php

<?php

class KrakenApiCache{

    private static $cache = array();


    /**
    * Cache a variabele for X time
    *
    * @param string $key
    * @param mixed $value
    * @param float $timeout seconds (0.1, 0.5, 1, 10)
    */
    public static function set($key, $value, $timeout = 1){

        self::$cache[$key] = array(
            'value'     => $value,
            'timeout'   => $timeout,
            'microtime' => microtime(true)
        );
    }

    /**
    * Get a variable from cache
    * Or return false if ttl is passed
    *
    * @param string $key
    */
    public static function get($key){

        if (isset(self::$cache[$key])){
            $timeout = self::$cache[$key]['timeout'];

            if (abs(microtime(true) - self::$cache[$key]['microtime']) <= self::$cache[$key]['timeout']){
                return self::$cache[$key]['value'];
            }
        }
        return false;
    }

}