I want to know Whether any cache plugin is installed in the WordPress website or not. At present, I get all active WordPress plugin ( Using get_option('active_plugins')) and check one by one, whether any cache plugins is active or not. I get the plugin name and check for strstr of cache.
But, I think this may not be the correct method. Is there any other method is available ?
Edit: I want to do this for 100s of websites hosted in many servers. It is not for one single website.