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.
1 Of her 2 million Instagram followers, 88.7% are female and 81.9% are single, with an average age of 19.3 years. Strongest brand affiliations within her audience include Sephora, Forever 21, Benefit Cosmetics and Victoriaâs Secret.  The SoulCycle fitness chain shares photos of its customers on Instagram.