/**
* Execute a Lua script server side
*/
public function evalScript($script, array $keys = array(), array $args = array())
{
$script = trim($script);
$result = $this->send('evalsha', array(sha1($script), array_merge($keys, $args), count($keys)));
if ($result === FALSE && stripos($this->driver->getLastError(), 'NOSCRIPT') !== FALSE) {
$this->driver->clearLastError();
$sha = $this->driver->script('load', $script);
$result = $this->send('evalsha', array($sha, array_merge($keys, $args), count($keys)));
}
return $result;
}