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.
Last updated: August 2, 2017. 1  Instagram announces 700 million users in their blog post. 2  Twitter has updated its active user numbers over a long time to 328 million. 3  VK reached 95 million monthly active users. 4  Reddit adds 16 million users and displays 250 million users on website. 5  Meetup reached 32.3 million users.