Php array small Functions

Recently, the project needs to have such a requirement on the array. The content of the array may change constantly. If you know a key name of the array, how can you get the next key name? At the beginning, I thought it would not be easy to write. I kept searching for Array-related functions in the book and searching the Internet. I found none of them. So I did not expect it to be easy to write. [Html]/** find the next key name of the current key name of the array * $ keys current key name * return the next key name */function next_array ($ array, $ keys) {$ n = 0; foreach ($ array as $ key => $ value) {if ($ n = 1) return $ key; if ($ key = $ keys) $ n ++} found that many times, you still have to rely on yourself.