PHP algorithm Monkey King game

Monkey King game A group of monkeys are arranged in a circle. Numbers are arranged in sequence by 1, 2,... and N. Then start counting from the first one, count to the m, and kick it out of the circle, and start counting from behind it. Count to m and kick it out... so it keeps going. Until there is only one monkey left, the monkey is called the King. Programming to simulate this process, input M, N. output the number of the last king. Function monkeyking ($ N, $ m ){ $ Monkeys = range (1, $ N ); $ I = 0; // coordinates of the retrieved data $ Z = 0; // stop when you count to m While ($ mnum = count ($ monkeys)> 1 ){ If ($ I = $ mnum ){ $ I = 0; // circle } $ Z ++; $ I ++; If ($ z = $ m ){ Array_splice ($ monkeys, -- $ I, 1 ); $ Z = 0; // return to zero } } Return ($ monkeys [0]); }