gistfile1.php

<?php
static function getCache($p_mOptions = null) {

	switch(true) {

		case is_array($p_mOptions):
			return new PPI_Cache($p_mOptions);
			break;

		case is_null($p_mOptions) || ($bIsString = is_string($p_mOptions)):
			$config  = self::getConfig();
			$options = isset($config->cache) ? $config->cache->toArray() : array();
			if(isset($bIsString)) {
				$options['handler'] = $p_mOptions;
			}
			return new PPI_Cache($options);
			break;

		default:
			throw new PPI_Exception('Invalid option passed to getCache()');
			break;

	}
}