private function read($key)
    {
        $fname = $this->getObjectPath($key);
        if (file_exists($fname)) {
            $content = file_get_contents($fname);
            return unserialize($content);
        }
        return null;
    }
private function read($key)
    {
        $fname = $this->getObjectPath($key);
        if (file_exists($fname)) {
            $content = file_get_contents($fname);
            return unserialize($content);
        }
        return null;
    }
private function read ( $ key ) { $ fname = $ this -> getObjectPath ( $ key ) ; if ( file_exists ( $ fname ) ) { $ content = file_get_contents ( $ fname ) ; return unserialize ( $ content ) ; } return null ; }
Read cache object from a file

@param string $key

@return array
Read cache object from a file