I know there are two ways to clear cache in my site with cloudflare,use PHP API and use user panel but I want to ask. I have a link like that https://abc.com/db/upload/DM_20130621_001_FRNT.jpg?update=123, if I change https://abc.com/db/upload/DM_20130621_001_FRNT.jpg?update=456 so cache in cloudflare will change to lastest?
That depends on your settings, but by default Cloudflare does take the query string into account, so your second link would not access the cache.
Thanks for your answer. Please let me know how to setting this.
The caching section in the dashboard.
Thank yo so much.
Post the link and a screenshot of your caching settings.