<?php
function getLeader($n,$m) { 
  $res=0; 
  for($i=2; $i<=$n; $i++) {
    $res=($res+$m)%$i; 
  }
  return $res+1; 
} 
$leader = getLeader(13,34);
echo $leader;
?>

<?php
//定义函数
function getKing($monkeys , $m , $current = 0){
  $number = count($monkeys);
  $num = 1;
  if(count($monkeys) == 1){
    echo '<font color="red">编号为'.$monkeys[0].'的猴子成为猴王了!</font>';
    return;
  }else{
    while($num++ < $m){
      $current++ ;
      $current = $current%$number;
    }
    echo "编号为".$monkeys[$current]."的猴子被踢掉了...<br/>";
    array_splice($monkeys , $current , 1);
    getKing($monkeys , $m , $current);
  }
}
$n=13;   //总共猴子数目
$m = 34;  //数到第几只的那只猴子被踢出去
$monkeys = range(1,$n); //将猴子编号放入数组中
getKing($monkeys , $m);   //调用函数
?>