回答編集履歴

  ```php

  $array = [ 50, 37, 29, 59, 31, 88, 48, 87, 3, 63 ];

 

  recursive( $array );

 

  foreach( $array as $value ) {

  print( "$value\n" );

  }

 

  function recursive( &$array, $i = 0, $j = 0 ) {

  if ( count( $array )-1 === $i ) {

  return;