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.
The cost of a thousand impressions for a sponsored photo on Instagram, down from $40 in 2013 when Instagram first rolled out ads. Instagram says more than 300 million people around the world check out the photo-sharing app each month. Instagram's minimum ad spend is $200,000.