Compare arrays, and returns the differences (compare values only, using a user-defined key comparison function) array_udiff_assoc() Compare arrays, and returns the differences (compare keys and values, using a built-in function to compare the keys and a user-defined function to compare the values) array_udiff_uassoc() Compare arrays, and returns the differences (compare keys and values, using two user-defined key comparison functions)
Instagram usage is particularly strong among millennials. This year, there will be 48.2 million millennial Instagram users in the US. By 2019, nearly two-thirds of all millennial smartphone users will use Instagram.
Sep 22, 2015: 400 Million (http://blog.instagram.com/post/1...) Dec 10, 2014: 300 Million Monthly Users( http://techcrunch.com/2014/12/10... ) Mar 26, 2014: 200 million Monthly Active.