如何编写函数Max（$ array），它返回$ array中包含的最大值或嵌套在$ array中的一些数组

Question

Eg:

$array= array(array(141,151,161),2,3,array(101,202,array(303,606)));

output :606

Answer 1

Same idea as Pascal's solution, only shorter thanks to the Standard PHP Library

$arr= array(array(141,151,161),2,3,array(101,202,array(303,404)));
echo rmax($arr);

function rmax(array $arr) {
  $it = new RecursiveIteratorIterator(new RecursiveArrayIterator($arr));
  // initialize $max
  $it->next(); $max = $it->current();
  // "iterate" over all values
  foreach($it as $v) {
    if ( $v > $max ) {
      $max = $v;
    }
  }
  return $max;
}