gistfile1.php

<?php

class MyManager extends Phalcon\Mvc\Model\Manager
{

	protected $_cache;

	public function setCache($cache)
	{
		$this->_cache = $cache;
	}

	public function executeQuery($phql, $variables=null, $bindParams=null)
	{

		$realPhql = preg_replace_callback('/:([a-z]+):/', function($matches) use ($variables) {
			if (isset($variables[$matches[1]])){
				return $variables[$matches[1]];
			}
		}, $phql);

		$hash = sha1($realPhql);
		if ($this->_cache->exists($hash)) {
			$query = $this->createQuery($phql);
			$resultset = $query->execute($variables);
			$this->_cache->save($hash, $resultset);
			return $resultset;
		}
		return $this->_cache->get($hash);
	}

}

$a = new MyManager();
$a->executeQuery('SELECT * FROM Robots WHERE id > :id: AND type = :type:', array(
	'id' => 100, 'type' => 'mechanical'
));