creating random associative arrays

random_array.php

<?php

function random_array(&$current) {
  foreach ($current as $k => &$v) {
    if ((rand() % 10) / 10 >= 0.68) {
      $v = array(0, 'aoiyu', 1337);
      random_array($v);
    }
  }
  unset($v);
}

$start = array(0,1,2);
random_array($start);
echo json_encode($start);