如何在php中为json api实现缓存系统

I have a few custom social buttons on my website for whom I get the share number/followers number using json from API. I have tried to implement a cache system to reduce the load time and eliminate de risk of being 'red-flagged' for over-using the APIs. However, I had no success in this area, basically because I don't quite understand the integration steps. I hope someone could help me integrate a cache system.I have a few custom social buttons on my websit