public function prefix($prefix = null)
    {
        if (null !== $prefix) {
            $this->prefix = substr(md5($prefix), 0, 10) . '_';
        }

        return $this->prefix;
    }
public function prefix($prefix = null)
    {
        if (null !== $prefix) {
            $this->prefix = substr(md5($prefix), 0, 10) . '_';
        }

        return $this->prefix;
    }
public function prefix ( $ prefix = null ) { if ( null !== $ prefix ) { $ this -> prefix = substr ( md5 ( $ prefix ) , 0 , 10 ) . '_' ; } return $ this -> prefix ; }
Define prefix for Cache Application and return it.

@param string $prefix Base prefix (Cache Application)
@return string Return base prefix.
Define prefix for Cache Application and return it .