php7 emulation of apc_* functions

        // php7 emulation of apc_* functions
        if (!function_exists('apc_fetch')) {
            function apc_fetch($key) {
                return apcu_fetch($key);
            }
            function apc_exists($keys) {
                return apcu_exists($keys);
            }
            function apc_delete($key) {
                return apcu_delete($key);
            }
            function apc_store($key, $var) {
                return apcu_store($key, $var);
            }
            function apc_inc($key, $step = 1) {
                return apcu_inc($key, $step);
            }
            function apc_cache_info($cache_type = "", $limited = false){ return apcu_cache_info($limited); }

            function apc_clear_cache() { return apcu_clear_cache(); }
        }