PHP nested arrays creation

[betazold]

<?php
 
 
 
function fill($keys, $value, $a = array()) {
   $keys = (array)$keys;
   $key = array_pop($keys);
   $v = &$a;
   foreach ($keys as $keyName) {
      $v = &$v[$keyName];
   }
   $v[$key] = $value;
   return $a;
}
 
var_dump(fill(['a', 'b', 'c', 'd', 'e'], 'f', array('a' => array('b' => array('b1' => array())))));
var_dump(fill(['a', 'b', 'c'], 'd', array('a' => array('a1' => 3))));
var_dump(fill(['c'], 'd'));
var_dump(fill('kkk', 'd'));