lulco / redis-proxy

     * @param int $count

     * @return array|boolean|null list of found keys, returns null if $iterator is 0 or '0'

     */

    public function scan(&$iterator, $pattern = null, $count = null)

    {

        if ((string)$iterator === '0') {

            return null;

        }

        $this->init();

        if ($this->actualDriver() === self::DRIVER_PREDIS) {

            $returned = $this->driver->scan($iterator, ['match' => $pattern, 'count' => $count]);

            $iterator = $returned[0];

            return $returned[1];

        }

        return $this->driver->scan($iterator, $pattern, $count);

    }

    /**

     * Get the value of a hash field

     * @param int $count

     * @return array|boolean|null list of found fields with associated values, returns null if $iterator is 0 or '0'

     */

    public function hscan($key, &$iterator, $pattern = null, $count = null)

    {

        if ((string)$iterator === '0') {

            return null;

        }

        $this->init();

        if ($this->actualDriver() === self::DRIVER_PREDIS) {

            $returned = $this->driver->hscan($key, $iterator, ['match' => $pattern, 'count' => $count]);

            $iterator = $returned[0];

            return $returned[1];

        }

        return $this->driver->hscan($key, $iterator, $pattern, $count);

    }

    /**

     * Add one or more members to a set

     * @param int $count

     * @return array|boolean|null list of found members, returns null if $iterator is 0 or '0'

     */

    public function sscan($key, &$iterator, $pattern = null, $count = null)

    {

        if ((string)$iterator === '0') {

            return null;

        }

        $this->init();

        if ($this->actualDriver() === self::DRIVER_PREDIS) {

            $returned = $this->driver->sscan($key, $iterator, ['match' => $pattern, 'count' => $count]);

            $iterator = $returned[0];

            return $returned[1];

        }

        return $this->driver->sscan($key, $iterator, $pattern, $count);

    }

    /**

     * Returns null instead of false for Redis driver