The left side of the picture is the code, and the right side is the running result. I execute the aaa() function, which executes the kissom() function three times, but why are the results printed the second and third times the same, and there is only one line? It should be a static problem. When executing the second and third times, $ count is updated. But this function can be executed if it is not placed in tp, but cannot be executed in the tp framework. Is there anyone who can give me some guidance?